Fix UT failure - app name must be unique

Author: Athira M

src/test/java/com/google/firebase/remoteconfig/MockRemoteConfigClient.java

@@ -39,8 +39,8 @@ static MockRemoteConfigClient fromTemplate(Template resultTemplate) {
     return new MockRemoteConfigClient(resultTemplate,null, null, null);
   }
 
-  static MockRemoteConfigClient fromServerTemplate(String resultTemplate) {
-    return new MockRemoteConfigClient(null, resultTemplate,null, null);
+  static MockRemoteConfigClient fromServerTemplate(String resultServerTemplate) {
+    return new MockRemoteConfigClient(null, resultServerTemplate,null, null);
   }
 
   static MockRemoteConfigClient fromListVersionsResponse(

src/test/java/com/google/firebase/remoteconfig/ServerTemplateImplTest.java

@@ -327,7 +327,7 @@ public void testGetEvaluateConfigUnsetDefaultConfigReturnsDefaultValueSource() t
   private static final String TEST_ETAG = "etag-123456789012-1";
 
   private FirebaseRemoteConfig getRemoteConfig(FirebaseRemoteConfigClient client) {
-    FirebaseApp app = FirebaseApp.initializeApp(TEST_OPTIONS);
+    FirebaseApp app = FirebaseApp.initializeApp(TEST_OPTIONS, "test-app");
     return new FirebaseRemoteConfig(app, client);
   }