Use the jenkins testrunner

Use the jenkins testrunner overall, it works also on EPEL. Adapt to
work together with make_release
settings: remove dead code
test_misc: bugfix, add test of source.extract()
spec_file: Nasty fix for undefined %gem_* macros
ruby.py: use expanded values when comparing specfile.
Add a rubygem test, plugging last big hole in plugins testing.
generic.py: string constant quoting bugfix
Add a deps module (repoquery wrapper).
Automate  CheckOwnDirs (#187)
Automate CheckOwnOther (part of #187)
Automate DirectoryRequires (part of #187)