We changed review01.openstack.org to review02.openstack.org in the host
var file matchers for this job thinking that was the issue previously.
Unfortunately the actual file is review02.opendev.org. Update the
matcher again to actually trigger the job.
We also make a small edit to the gerrit role's README to ensure we
trigger the job when this change lands.
Change-Id: I1f235d0ddbb2d7f400ea2e99ffabdf5db35671a1
a5dd619e24