Ovs atomic disconnect
Ovs atomic disconnect

As the connected flag can be reset by the OvsNotifier on Disconnect, we
only to call the ovs.Disconnect() method only if we are still connected.

Change-Id: I8cbddbeb3bf6f6338440f4c4546ac49a824b2aad
Reviewed-on: http://softwarefactory-project.io/r/5015
Reviewed-by: Sylvain Afchain <b9baee1c2e4cc202620c6529e0c0bd3dbc38b6dc@gmail.com>
Tested-by: Sylvain Afchain <b9baee1c2e4cc202620c6529e0c0bd3dbc38b6dc@gmail.com>
Workflow: Sylvain Afchain <b9baee1c2e4cc202620c6529e0c0bd3dbc38b6dc@gmail.com>
Tested-by: Jenkins CI <d95b56ce41a2e1ac4cecdd398defd7414407cc08@softwarefactory-project.io>

lebauce/skydive,safchain/skydive,lebauce/skydive,lebauce/skydive,lebauce/skydive,safchain/skydive,redhat-cip/skydive,skydive-project/skydive,redhat-cip/skydive,skydive-project/skydive,skydive-project/skydive,safchain/skydive,lebauce/skydive,lebauce/skydive,safchain/skydive,safchain/skydive,safchain/skydive,safchain/skydive,redhat-cip/skydive,lebauce/skydive,safchain/skydive,skydive-project/skydive,skydive-project/skydive,skydive-project/skydive,skydive-project/skydive,lebauce/skydive