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

This reverts commit e1a5cdc.

Author: weizhouapache

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

@@ -2359,7 +2359,10 @@ public Extension getExtensionForPhysicalNetworkAndProvider(long physicalNetworkI
 
         ExtensionResourceMapVO map = extensionResourceMapDao.findResourceByExtensionIdAndResourceIdAndType(
                 ext.getId(), physicalNetworkId, ExtensionResourceMap.ResourceType.PhysicalNetwork);
-        return ext;
+        if (map != null) {
+            return ext;
+        }
+        return null;
     }
 
     @Override