fix: Fix Spel expression in case of non-defined variable (#4361)

Signed-off-by: Pavel Jareš <Pavel.Jares@broadcom.com>

Author: pavel-jares-bcm

gateway-service/src/main/java/org/zowe/apiml/gateway/config/RoutingConfig.java

@@ -23,7 +23,7 @@
 @Configuration
 public class RoutingConfig {
 
-    @Value("${apiml.service.ignoredHeadersWhenCorsEnabled:-}")
+    @Value("${apiml.service.ignoredHeadersWhenCorsEnabled:}")
     private String ignoredHeadersWhenCorsEnabled;
 
     @Value("${apiml.security.x509.acceptForwardedCert:false}")

gateway-service/src/main/java/org/zowe/apiml/gateway/service/RouteLocator.java

@@ -49,11 +49,11 @@ public class RouteLocator implements RouteDefinitionLocator {
     @Value("${apiml.service.forwardClientCertEnabled:false}")
     private boolean forwardingClientCertEnabled;
 
-    @Value("${apiml.gateway.servicesToLimitRequestRate:-}")
+    @Value("${apiml.gateway.servicesToLimitRequestRate:}")
     List<String> servicesToLimitRequestRateProperty;
     List<String> servicesToLimitRequestRate;
 
-    @Value("${apiml.gateway.servicesToDisableRetry:-}")
+    @Value("${apiml.gateway.servicesToDisableRetry:}")
     List<String> servicesToDisableRetryProperty;
     List<String> servicesToDisableRetry;
 

zaas-service/src/main/java/org/zowe/apiml/zaas/security/webfinger/StaticWebFingerProvider.java

@@ -25,7 +25,7 @@
 @Service
 public class StaticWebFingerProvider implements WebFingerProvider {
 
-    @Value("${apiml.security.webfinger.fileLocation:-}")
+    @Value("${apiml.security.webfinger.fileLocation:}")
     private String webfingerDefinition;
     private static final YAMLFactory YAML_FACTORY = new YAMLFactory();