Check if socket is valid before calling the SslHandShakeCb as the cb can be called after the connections is deleted.
Check if socket is valid before calling the SslHandShakeCb as the cb can be called
after the connections is deleted.

Change-Id: I11fbc8069dbc1749d3982da3d61dbb187d009cba
Closes-Bug:1513004

rombie/contrail-controller,eonpatapon/contrail-controller,codilime/contrail-controller,sajuptpm/contrail-controller,sajuptpm/contrail-controller,sajuptpm/contrail-controller,nischalsheth/contrail-controller,tcpcloud/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,tcpcloud/contrail-controller,codilime/contrail-controller,tcpcloud/contrail-controller,rombie/contrail-controller,sajuptpm/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,tcpcloud/contrail-controller,rombie/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,sajuptpm/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,sajuptpm/contrail-controller,codilime/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,codilime/contrail-controller