Fixes #7802 - ensures qpidd group present before adding user to group

Related pull-requests that fix  #7802
https://github.com/Katello/puppet-katello/pull/45
https://github.com/Katello/puppet-katello_devel/pull/26
https://github.com/Katello/puppet-qpid/pull/11
@ehelms it was failing the katello_spec test without it...complained that Group[qpid] was not defined in the test.