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

* bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=1092474
* pass params to certs::katello class so that the appropriate prefix and candlepin url are created in the template
Merge pull request #7 from dustint-rh/bz1092474_fix_rhsm_template

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