Handling RACE conditions in bind/unbind service

Handling RACE conditions in bind/unbind service

There are race conditions seen while binding/unbinding services,
due to the configlistener and statelistener being executed parallelly.
Avoiding this by adding a new service_binding_entity, and processing
service binding only on the entity owner.

Removing batching of interface-child-info as it is causing issues in
clustered tests

Change-Id: I35ed95fe99878fcbde757cd61880400832b30220
Signed-off-by: Faseela K <faseela.k@ericsson.com>