Remove gearman settled check

Having the launch client wait for gearman job registrations is
not useful any more since no part of zuul checks job registrations
before submitting a job.  Instead, they all assume that workers
will eventually show up and complete them.

This reduces startup time and verbosity.

Change-Id: I460c79fbb6c513aa1217a710ce4fc8cdd927a4dd
1 file changed