Merge tag 'pulp-rpm-2.5.1-0.2.beta' into 2.5-release

Tagging package [pulp-rpm] version [2.5.1-0.2.beta] in directory [./].
Release 2.5.1
Automatic commit of package [pulp-rpm] release [2.5.1-1].
Merge branch '2.5-release' into 2.5-dev
Update the spec version
Replace the use of createrepo with createrepo_c