Fixes #5486 - Fix prefix + url for rhsm BZ1092474

Fixes an issues where katello_devel module doesn't populated the prefix
and candlepin url for rhsm templates correctly. This is because
katello:params isn't available from puppet-katello_devel.

* bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=1092474
Merge pull request #25 from dustint-rh/bz1092474_fix_rhsm_template

fixes #5486  prefix and candlepin url incorrect for rhsm template on dev...