BZ #1151603: Change interface filter to look at non-VIP interfaces

https://bugzilla.redhat.com/show_bug.cgi?id=1151603

The interface assignment screen was supposed to filter out already
assigned, non-vip subnets. It was changed to 'vip' in a refactor. What
then happened is that the subnet where the vips were assigned would get
filtered out, and could no longer be assigned to an interface.
Merge pull request #353 from bcrochet/bz/1151603

BZ #1151603: Change interface filter to look at non-VIP interfaces
BZ #1154669: Allow host to be set to existing hostgroup

https://bugzilla.redhat.com/show_bug.cgi?id=1154669

If the host is already associated to a deployment, this allows the host
to be edited directly in foreman, and to keep the hostgroup the same. It
will not allow any other deployment hostgroups.
Fixes bz#1146252 Redirect via window location if interfaces don't match
Merge pull request #355 from knowncitizen/bz1146252

Fixes bz#1146252 Redirect via window location if interfaces don't match
Merge pull request #354 from bcrochet/bz/1154669

BZ #1154669: Allow host to be set to existing hostgroup
Fix version specific deface erb tag

fixes BZ #1154745
Merge pull request #356 from ifarkas/fix_deface_erb_tag

Fix version specific deface erb tag