Description of problem:
hammer content-view create doesn't accept repositories names
Using --repositories option you are unable to create CV.
But using --repository-ids option it works.

Version-Release number of selected component (if applicable):
6.1.1

How reproducible:
100%

Steps to Reproduce:
0.Setup vars:
# product="Red Hat Enterprise Linux Server"
# reposet="Red Hat Enterprise Linux 7 Server (RPMs)"
# reponame="Red Hat Enterprise Linux 7 Server RPMs x86_64 7Server"

1.Enable repository:
# hammer repository-set enable --organization-id 1 --product "$product" --name "$reposet" --releasever 7Server --basearch x86_64
Repository enabled

2.Create CV
# hammer content-view create --organization-id 1 --name CV --repositories "$reponame"
Could not create the content view:
  Error: Could not find repository, please set one of options --repositories, --repository-ids.

But using --repository-ids option it works:
# repoid=$(hammer --csv repository info --organization-id 1 --product "$product" --name "$reponame" | awk -F, 'NR>1{print $1}')
# echo $repoid
71
# hammer content-view create --organization-id 1 --name CV_ids --repository-ids "$repoid"
Content view created


Actual results:
Error: Could not create the content view

Expected results:
CV is created even with using --repositories

Additional info:
possibly it would require to introduce new option '--product' to uniquely specify repository by its name