Fixes #7119/BZ1130645: double quote host collection name in search.

The host collection search was using single quotes which search
isn't happy with.  This commit changes the host collection bulk
actions to use double quotes.

http://projects.theforeman.org/issues/7119
https://bugzilla.redhat.com/show_bug.cgi?id=1130645
Merge pull request #4597 from waldenraines/7119

Fixes #7119/BZ1130645: double quote host collection name in search.