I inadvertently included a version of rubygem-mysql2 > 0.3 and Foreman
requires version < 0.3.
I just built 0.2.18 rpm's, purged the 0.3.11 versions from the repos,
uploaded the 0.2.18 versions and updated the repodata. If you are going to
install foreman-mysql2 please ensure you don't have rubygem-mysql2-0.3.11-*
installed before doing so.