Make fedora jobs non-voting
Make fedora jobs non-voting

We're having persistent issues with these nodes starting, leading to
RETRY_LIMIT failures in the gate.  Send to non-voting while we
investigate further.

Change-Id: I2f385f21513f56e902e13602746dab7c4caf6a94

openstack-infra/openstack-zuul-jobs,openstack-infra/openstack-zuul-jobs