BUG 833: Improve logging in NetconfClient, logging-bridge. Increase connection timeout in sal-netconf-connector.

Stop polluting log file with unnecessary 'Exception' messages by logging-bridge, print stack trace with exceptions using slf4j.
Increase connection timeout in sal-netconf-client from 5s to 20s.
Include label in NetconfClient exceptions.

Change-Id: If6819029fb79ea6ebead6b6745adf2c439d107da
Signed-off-by: Tomas Olvecky <tolvecky@cisco.com>
Signed-off-by: Surekha Bejgam <sbejgam@cisco.com>
BUG 790: Requestor FRM to update the sw views on remote execution

- When FRM relay the flow add/remove/modify action to an executor
  FRM on another cluster node, it should be in charge of updating
  the sw view caches. As this happens inside the caller application's transaction.
  Currently the executor updates the cache, update which is not
  reflected in the requestor until the caller application commits the transaction.

Change-Id: I36f3efa2770e71c24e0d059d6bf08eee2c1684f5
Signed-off-by: Alessandro Boch <aboch@cisco.com>
Signed-off-by: Surekha Bejgam <sbejgam@cisco.com>