927335 - set newly created repos to automatically use products gpg key

unless specified
Bug 1009092: Adding blank GPG Key option to product and repository edit.
Bug #1009594 - use modal dialog instead of dropdown, fixes #2892.
Rubocop: Upgrading to 0.13.1
Merge pull request #2975 from jlsherrill/927335

927335 - set newly created repos to automatically use products gpg key
Travis: Dropping ruby 2.0 checks for now
994917: Content Search: Errata: show null severity as ''

There is currently a bug in pulp
(https://bugzilla.redhat.com/show_bug.cgi?id=1009966) which
is resulting all errata not having a severity.  As a result,
when content search shows the errata listing it shows as 'null'.
This commit will simply render a '' (instead of null) when
there is no errata.
Merge pull request #2996 from waldenraines/delete-modal

Bug #1009594 - use modal dialog instead of dropdown, fixes #2892.
Merge pull request #2987 from ehelms/bug-1009092

Bug 1009092: Adding blank GPG Key option to product and repository edit.
Merge pull request #2999 from daviddavis/temp/20130919084419

Rubocop: Upgrading to 0.13.1
Merge pull request #3005 from daviddavis/temp/20130919132420

Travis: Dropping ruby 2.0 jobs for now
Content Uploads: Adding indexing and error checking
Merge pull request #3004 from daviddavis/temp/20130919095933

Content Uploads: Adding indexing and error checking
981613: Filter names: add one-line-ellipsis to filter list

This small commit is to address the formatting issue that
could arise if the user entered a very long filter name
(e.g. 200 characters).
Merge pull request #3008 from bbuckingham/bz981613

981613: Filter names: add one-line-ellipsis to filter list
Merge pull request #3006 from bbuckingham/bz994917

994917: Content Search: Errata: show null severity as ''