So far, some validations in Octavia might have run too early in the
validation flow, for example, a request is being sent to a member which
is still not ready.
This patch replaces the simple assertEqual, with an exception which will
be raised (RoundRobinException), in case that one member is not ready
yet.
The validator method caller wraps the call with a try/except clause, to
make sure Octavia has enough time to launch a ready-vm.
Change-Id: Ie3821441ff1659b7f919a34e517c32b552eaf544
743adacdf4