Google Storage Private Signer was encoding twice (#462)

* Fix Missing Escape '+' from Storage Urls

* Fix Missing Escape '+' from Storage Urls

* Rename Method

* Improve comment

* Missing Url Encode after Refactoring

* Var name improved for readability

* EncodeURL mark as obsolete

* Use EscapeDataString instead of UrlEncode for encoding "path" part of the URL.

* Do not Encode URLS when using Google Signer, as the Signer already Encodes the URL

Author: ggallotti

dotnet/src/dotnetframework/Providers/Storage/GXGoogleCloud/ExternalProviderGoogle.cs

@@ -282,7 +282,7 @@ private bool IsPrivateResource(GxFileType fileType)
 		private string GetURL(string objectName, GxFileType fileType, int urlMinutes = 0)
 		{
 			if (IsPrivateResource(fileType))
-				return Signer.Sign(Bucket, StorageUtils.EncodeUrlPath(objectName), ResolveExpiration(urlMinutes), HttpMethod.Get);
+				return Signer.Sign(Bucket, objectName, ResolveExpiration(urlMinutes), HttpMethod.Get);
 			else
 			{
 				return StorageUri + StorageUtils.EncodeUrlPath(objectName);