msc: Disable expecting CommonID when testing 'latest'
As of osmo-ttcn3-hacks.git Change-Id I4976d9bb1f07c8ab4ffa02848414f8ddd1bdfd3f the test suite expects the MSC to send a CommonID to the BSC. As older/existing tagged osmo-msc don't do that, we needt odisable that check when verifying 'latest'.
