Easy RPM scratch builds with Jenkins

As the last part of automating the nightly RPM builds via Jenkins and
Koji, I've added a new job to Jenkins:

http://ci.theforeman.org/job/packaging_build_matrix_rpm

This can perform complete builds, scratch and non-scratch, for any of
our projects. If you want to test a change, it can build from a branch
on your own GitHub fork, so you may find this useful. Info is here on
which parameters to set:

http://projects.theforeman.org/projects/foreman/wiki/RPM_Packaging#Use-Jenkins

If you don't already have a Jenkins login and would find it useful, ask
me or somebody else and we can fix that.

(Nightly builds are being triggered now as downstream jobs from
test_develop, test_proxy_develop etc, so only get built when unit tests
pass.)

ยทยทยท -- Dominic Cleal Red Hat Engineering