Update stub_commands

Some spec tests are currently failing due to a change in
openstack-network (which this cookbook includes).  This change updates
the ovs-vsctl stub_commands to bring them in line with what's actually
being executed in openstack-network.

Change-Id: I65730f6fd7c96c8a850e66154b2939a349a5b563
Closes-Bug: #1289350