(PE-3516) Add rhel7 to puppet_libdir conditional
(PE-3516) Add rhel7 to puppet_libdir conditional

Rhel7 follows the recent fedora convention of using vendorlibdir instead
of sitelibdir so this commit adds rhel7 to the conditonal macro.

puppetlabs/ezbake,puppetlabs/ezbake,puppetlabs/ezbake