BUG-1621 Fix reconnecting.

Netconf-connector did not reconnect after recent changes (Ssh mina integration)
SshHandler was in pipeline after listener in reconnect, thats why the listener received no event about session down.

Change-Id: Id39062f51bc3a0caf066ca49682a2acc837b06ef
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Merge "BUG-1621 Fix reconnecting."