Avoid unnecessary bridge Oper DS read

Avoid unnecessary bridge Oper DS read

Description:
Avoid uncessary bridge Oper DS read just to get the bridge-name during
termination-point create and delete. The bridge name is already
available in the termination point parent node-id(/bridge/br-int) from
which bridge name can get fetched out.

Ex: "node-id": "ovsdb://uuid/d6f5d855-cdae-4275-bf4f-a71ee6e24ca3/bridge/br-int"

Signed-off-by: Chetan Arakere Gowdru <chetan.arakere@altencalsoftlabs.com>
Change-Id: I420face0c628f118b14c5c213756075a199ea6fa
Signed-off-by: Chetan Arakere Gowdru <chetan.arakere@altencalsoftlabs.com>
Signed-off-by: xcheara <chetan.arakere@altencalsoftlabs.com>