Don't run and check c-api if it is disabled

Previously we didn't block out the c-api startup code because the
devstack functions to start services check that for us. However, since
the cinder devstack code checks the service is up and runs the tls proxy
if tls is enabled we need to block it all off to avoid doing those
things if c-api is disabled.

Change-Id: I1c4f22f785af96caaf4baa21ff28714b9afd3458
1 file changed