Bug:645 - MDSAL Notification pool threads not getting spawned besides the core threads

Change-Id: I6851f9b90b500b2b10a135bcda784a11c8f44786
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>
Bug:701-Have Typed ErrorNotification for different node errors

Change-Id: I674203531d0205dd13b47b64616624b5193bcb4d
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>
Merge changes I67420353,I6851f9b9

* changes:
  Bug:701-Have Typed ErrorNotification for different node errors
  Bug:645 - MDSAL Notification pool threads not getting spawned besides the core threads