Invoke a Connect thrift call to Agent whenever the connection to Agent is re-established. This is required to ensure that Agent audit of previous port configuration happens.

Change-Id: Id46a49525e2db53282409b599a535eb0edb0274a
(cherry picked from commit 698375bdc56f85301e517d8690eacd69e293258b)
Merge "Invoke a Connect thrift call to Agent whenever the connection to Agent is re-established. This is required to ensure that Agent audit of previous port configuration happens." into R2.0