CLOUDSTACK-5300: Catch vpn add error failure, removed failed user and return failure status

server/src/com/cloud/network/vpn/RemoteAccessVpnManagerImpl.java

@@ -511,7 +511,7 @@ public class RemoteAccessVpnManagerImpl extends ManagerBase implements RemoteAcc
                             }
                         }
                     }
-                } catch (ResourceUnavailableException e) {
+                } catch (Exception e) {
                     s_logger.warn("Unable to apply vpn users ", e);
                     success= false;