Copy Directory from AzureTenant and Type from AzureEnvironment in DeepCopy of Azure Context (#402)

* Define and implement DeepCloneable interface for Azure* class such as AzureContext

1. Define and implementation `IDeepCloneable` interface
2. Remove unused codes in `DefaultProfile`

* Address the review comments

* Address review comments

Author: msJinLei

src/Authentication.Abstractions.Test/ContextUnitTests.cs

@@ -34,16 +34,18 @@ public void TestDeepCopy()
             IAzureAccount account = new AzureAccount()
             {
                 Id = "someone@somewhere.com",
-                Type = "User"
+                Type = AzureAccount.AccountType.User
             };
 
             IAzureEnvironment environment = new AzureEnvironment()
             {
-                Name = "my environment"
+                Name = "my environment",
+                Type = AzureEnvironment.TypeDiscovered
             };
             IAzureTenant tenant = new AzureTenant()
             {
-                Id = "DDDDDDDD-DDDD-DDDD-DDDD-DDDDDDDDDDDD"
+                Id = "DDDDDDDD-DDDD-DDDD-DDDD-DDDDDDDDDDDD",
+                Directory = SubHomeTenant
             };
             IAzureContext original = new AzureContext(subscription, account, environment, tenant);
             const string PropertyKey = "customPropertyKey";
@@ -68,6 +70,13 @@ public void TestDeepCopy()
             // custom property
             Assert.Equal(SubHomeTenant, clone.Subscription.GetHomeTenant());
             Assert.Equal(PropertyValue, clone.GetProperty(PropertyKey));
+
+            // implementation specific attributes
+            Assert.Equal(((AzureEnvironment)original.Environment).Type, ((AzureEnvironment)clone.Environment).Type);
+            Assert.Equal(((AzureTenant)original.Tenant).Directory, ((AzureTenant)clone.Tenant).Directory);
+
+            //tokenCache checking
+            Assert.Null(clone.TokenCache.CacheData);
         }
 
         [Fact]

src/Authentication.Abstractions/Extensions/AzureContextExtensions.cs

@@ -171,6 +171,16 @@ public static IAzureContext DeepCopy(this IAzureContext context)
             deepCopy.Tenant.CopyFrom(context.Tenant);
             deepCopy.Subscription.CopyFrom(context.Subscription);
             deepCopy.Environment.CopyFrom(context.Environment);
+
+            //TODO：Whenever to introduce more properties that needs to be copied here, extract the logic to a new method.
+            if (context.Tenant is AzureTenant azureTenant)
+            {
+                ((AzureTenant)deepCopy.Tenant).Directory = azureTenant.Directory;
+            }
+            if (context.Environment is AzureEnvironment azureEnvironment)
+            {
+                ((AzureEnvironment)deepCopy.Environment).Type = azureEnvironment.Type;
+            }
             deepCopy.CopyPropertiesFrom(context);
             return deepCopy;
         }

src/ResourceManager/Version2016_09_01/AzureRMCmdlet.cs

@@ -86,59 +86,7 @@ public IAzureContextContainer DefaultProfile
             set
             {
                 _profile = value;
-                /* If the profile is from customer setting, the ServicePrincipalSecret and CertificatePassword
-                 * which is required to get access token is always removed.
-                 * Try to recover ServicePrincipalSecret and CertificatePassword from the buildin profile.
-                 */
-                if (null != _profile && null != AzureRmProfileProvider.Instance.Profile.Accounts)
-                {
-                    var accountMap = CreateAccountMap(AzureRmProfileProvider.Instance.Profile.Accounts);
-                    foreach (var currentAccount in _profile.Accounts.Where(p => null != p?.Id))
-                    {
-                        if (accountMap.TryGetValue(currentAccount.Id, out IList<IAzureAccount> accList))
-                        {
-                            foreach (var acc in accList)
-                            {
-                                if (currentAccount.GetTenants().All(tId => acc.GetTenants().Contains(tId)))
-                                {
-                                    MergeProperty(currentAccount, acc, AzureAccount.Property.ServicePrincipalSecret);
-                                    MergeProperty(currentAccount, acc, AzureAccount.Property.CertificatePassword);
-                                    break;
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
-
-        private static Dictionary<string, IList<IAzureAccount>> CreateAccountMap(IEnumerable<IAzureAccount> accounts)
-        {
-            var accountMap = new Dictionary<string, IList<IAzureAccount>>();
-            foreach (var acc in accounts.Where(acc => null != acc?.Id && (null != acc.GetProperty(AzureAccount.Property.ServicePrincipalSecret)
-                    || null != acc.GetProperty(AzureAccount.Property.CertificatePassword))))
-            {
-                if (!accountMap.ContainsKey(acc.Id))
-                {
-                    accountMap[acc.Id] = new List<IAzureAccount>();
-                }
-                accountMap[acc.Id].Add(acc);
             }
-            return accountMap;
-        }
-
-        private static bool MergeProperty(IExtensibleModel dest, IExtensibleModel src, string propertyName)
-        {
-            if (string.IsNullOrEmpty(dest.GetProperty(propertyName)))
-            {
-                var propertyValue = src.GetProperty(propertyName);
-                if (!string.IsNullOrEmpty(propertyValue))
-                {
-                    dest.SetProperty(propertyName, propertyValue);
-                    return true;
-                }
-            }
-            return false;
         }
 
         private IAzureContextContainer GetDefaultProfile()
@@ -174,7 +122,10 @@ private IAzureContextContainer CloneProfileAndModifyContext()
                     }
                     profile.DefaultContext = profile.DefaultContext.DeepCopy();
                     profile.DefaultContext.Subscription.CopyFrom(matchingSub);
-                    profile.DefaultContext.Tenant.Id = matchingSub.GetTenant();
+                    profile.DefaultContext.Tenant = new AzureTenant()
+                    {
+                        Id = matchingSub.GetTenant()
+                    };
                     var matchingUser = profile.Accounts.FirstOrDefault(account => account.Id.Equals(matchingSub.GetAccount()));
                     if (matchingUser != null)
                     {