Fixes #3971 - warning shown when PXE template is edited and has hosts in build mode

fixes #11024 - update smart proxy realm docs link

fixes #10933 - in api/v1 templates should be name as config_templates

templates - sync from community-templates

Fixes #10683 - Permission to view individual compute resource VMs is incorrect

fixes #10910 - initiate select2 separately on interfaces selects

Fixes #7574 - Rails 4 :data attributes substitute deprecated HTML options

Fixes #10072: Support for user-data during image-based provisioning with libvirt (used for creating of Atomic libvirt VM)

fixes #10861 - Remove unused columns from the hosts table

• Serial - Never really used, probably can be refactored as kernel
  parameters.
• last_freshcheck, source_file_id - left overs from puppet old store
  configs compatibility that we no longer use, I assume no one is using...

Fixes #10854 - config_templates missing from show in taxonomies and os