MBS-Koji integration tests
This change introduces a set of Jenkins pipelines for building MBS
images and running integration tests against Koji using those images.
These pipelines are directly based on the WaiverDB pipeline work:
https://pagure.io/waiverdb/blob/master/f/openshift
The results of those tests are used to provide feedback to Pagure PRs
and to promote images through a series of environments, which may be
used to implement a continuous deployment process.
The current test cases, written in Groovy, are:
- module-build-init: initate a module build and check that tags
and targets in Koji are created correctly
- module-build-cgimport: build an empty module and ensure that
results are imported correctly into Koji, using the CGImport
interface