add tests

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Author: shwstppr

framework/extensions/src/main/java/org/apache/cloudstack/framework/extensions/manager/ExtensionsManagerImpl.java

@@ -1,4 +1,3 @@
-//
 // Licensed to the Apache Software Foundation (ASF) under one
 // or more contributor license agreements.  See the NOTICE file
 // distributed with this work for additional information
@@ -15,7 +14,6 @@
 // KIND, either express or implied.  See the License for the
 // specific language governing permissions and limitations
 // under the License.
-//
 
 package org.apache.cloudstack.framework.extensions.manager;