GONRG-1035

*Logs for Subscription exception response
*Docs improvement

provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/PubsubHandshakeHandler.java

+/*
+  Copyright 2020 Google LLC
+  Copyright 2020 EPAM Systems, Inc
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+ */
+
 package org.opengroup.osdu.notification.provider.gcp.pubsub;
 
 import org.opengroup.osdu.notification.provider.interfaces.IPubsubHandshakeHandler;

provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/util/GoogleServiceAccountValidatorImpl.java

@@ -52,7 +52,7 @@ public class GoogleServiceAccountValidatorImpl implements IServiceAccountValidat
                 GoogleIdToken.Payload payload = idToken.getPayload();
 
                 String email = payload.getEmail();
-                boolean emailVerified = Boolean.valueOf(payload.getEmailVerified());
+                Boolean emailVerified = payload.getEmailVerified();
 
                 return (emailVerified && (email.equalsIgnoreCase(userIdentity)));
             } else {

provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/util/JwtValidity.java

+/*
+  Copyright 2020 Google LLC
+  Copyright 2020 EPAM Systems, Inc
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+ */
+
 package org.opengroup.osdu.notification.provider.gcp.util;
 
 import lombok.Data;

provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/util/ServiceAccountJwtGcpClientImpl.java

+/*
+  Copyright 2020 Google LLC
+  Copyright 2020 EPAM Systems, Inc
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+ */
+
 package org.opengroup.osdu.notification.provider.gcp.util;
 
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;