Fix Stack overflow errors in OFP while killing karaf

The reconciliation framework returns "NotificationRegistration" which
would be used by the registering applications to unregister by calling
close() on it. The close() in NotificationRegistration was in turn again
trying to call close() of the registered applications which resulted in
infinite recursion leading to stack overflow.

Change-Id: Ib7932c2365dc373be4e953282786e8829929869d
Signed-off-by: gobinath <gobinath@ericsson.com>