fixes #8094 - Content Host - fix the host collection capacity

Currently, if host collection is set for 'unlimited' the capacity
will show as 'N / '; however, it should be 'N / Unlimited'
fixes #7680 - filter errata optionally by organization id from api
Fixes #8119 - Remove tests covered by rubocop
Fixes #7642 - Added backend/api for docker images
Merge pull request #4744 from daviddavis/temp/20141014085342

Fixes #7642 - Added backend/api for docker images
Merge pull request #4770 from daviddavis/temp/20141027120251

Fixes #8119 - Remove tests covered by rubocop
Merge pull request #4766 from jlsherrill/7680

fixes #7680 - filter errata optionally by organization id from api
Merge pull request #4765 from bbuckingham/issue-8094

fixes #8094 - Content Host - fix the host collection capacity
Fixes #8132: Remove unused styling and import to fix asset compile.
fixes #7690 - adding errata applicable/available systems api
Merge pull request #4773 from ehelms/fixes-8132

Fixes #8132: Remove unused styling and import to fix asset compile.
Merge pull request #4775 from jlsherrill/7690

fixes #7690 - adding errata applicable/available systems api
Fixes #7688: add a content hosts tab to the errata details.

Adds a content host tab to the errata details page that allows
the listing and syncing of applicable content hosts.

http://projects.theforeman.org/issues/7688
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