[Gluster-Maintainers] Automatic triggering broken on Jenkins

[Kaushal M]

The gerrit-trigger plugin which automatically triggered jobs is
temporarily not working. We are trying to find out why and will fix it
soon.

In the mean time maintainers who need tests to run immediately, can
manually trigger jobs. To manually trigger jobs,
1. Get the REFSPEC of the change from Gerrit. This will be available
from the review page for a change, and will be in the format
`refs/changes/42/11342/10`. You can get it easily from the `Download`
menu in the top-right of the page.

2. Go to the job page for the test you want on jenkins and click on
`Build with parameters`. You should land up on a page with URL similar
to `https://build.gluster.org/job/rackspace-regression-2GB-triggered/build?delay=0sec`

3. Enter the REFSPEC for the change in to the box and click build.
Jenkins should now schedule, run and report back the job status to
gerrit.

~kaushal