add rubygem-apipie-bindings to Fedora 19 and EL6 comps

It looks like rubygem-apipie-bindings is not available for el6 or Fedora 19 outside of the Foreman repo and it is a new dependency for Hammer. You may wish to hold off on this unil mbacovsk pushes the new version of apipie-bindings that no longer requires rubygem-18n though, so that it does not introduce a (albeit temporary) broken dependency.