centos-ci: run upstream QEMU tests with block-storage configured as Gluster

[nixpanic]

We should run the upstream QEMU tests against the version of QEMU provided by CentOS and configured with Gluster as backend storage. This should give us an early notice in case changes break the QEMU usage of libgfapi.

A request for ideas was sent to the qemu-devel list. Lukáš Doktor gave a very good description to get started.

[nigelbabu]

This is a good use case to use our new system of having jobs consume Centos CI Sample. If you or someone from the GEDI team can write a script that will do the entire setup and submit a pull request, I'm happy to test and merge. Extra points if you can also write the JJB file.

[sabose]

@nixpanic the qemu discussion link seems dead. Do you have any other reference on the get started?

[nixpanic]

I've resent you the emails with subject "Re: [Qemu-devel] Automated testing of block/gluster.c with upstream Gluster". Maybe someone can find them in other Qemu-devel archives, my google-foo was not up to it.