Bug 993588: Previously, if no default_environment_id was specified as
a parameter, the attribute was set to nil. This has been removed.
991447: Update content view definition clone to include cloning filters
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.
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 ''
Merge pull request #3001 from bbuckingham/bz991447

991447: Update content view definition clone to include cloning filters
867435 - Importing GPG file with some random text shouldn't be allowed
Merge pull request #2956 from jhadvig/gpg_validation

867435 - Importing GPG file with some random text shouldn't be allowed
Merge pull request #2988 from ehelms/bug-993588

Bug 993588: Previously, if no default_environment_id was specified as