Hammer CLI

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1116803
Description of problem:
Calling `hammer repository-set enable ...` produces error "{} are not valid substitutions for /content/dist/rhel/server/6/$releasever/$basearch/kickstart (RuntimeError)"

Version-Release number of selected component (if applicable):
Satellite-6.0.3-RHEL-7-20140702.0

How reproducible:
always

Steps to Reproduce:
1. # hammer product list --organization-id 3 | grep 5
5 | Red Hat Enterprise Linux Server | satellite-qa | 1 | not_synced
2. # hammer repository-set list --product-id 5 | grep 1952
1952 | kickstart | Red Hat Enterprise Linux 6 Server (Kickstart)
3. # hammer repository-set enable --product-id 5 --id 1952

1. hammer repository-set enable --product-id 5 --id 1952
   Could not enable repository: {} are not valid substitutions for /content/dist/rhel/server/6/$releasever/$basearch/kickstart

Expected results:
Should work