Fixes #8267 - accept template_url in call to foreman from proxy
Fixes #8421 - Host group search by OS attributes

Host group search by operating system only searches by name. Users
should be able to search by title and other fields, same as in the Hosts
index.
Fixes #8433 - Fix type transformation for all ENC-able NICs
templates - sync from community-templates
fixes #8471 - adds a number field input support

* change subnet vlan to number field
* change ldap port to number field
Fixes #8536 - can update and delete media with dot in name
Fixes #8284 - missing params in OS api docs
fixes #8348 - expose user variable to templates in group mail
fixes #8221 - search for subnet with taxonomy scope
fixes #8526 - file uploads are now possible via two_pane.

NOTE this will probably only work with HTML5 based browsers.
fixes #8513 - removing n+1 query from images#index
Fixes #8546 - Namespace interfaces and subnets to avoid a facts clash
fixes #8539 - refactoring a test to work for both GNU libc and Darwin libc
Fixes #5999 - vpc + pub ip -> attach pub ip
fixes #5841 - use inner query when retrieving reports for subset of authorised hosts
fixes #8228 - add a config_templates concern to serve config_templates controllers
Fixes #8400: Remove eager loading of puppetclass in lookup_keys index
Fixes #8401: n+1 query on group parameters host edit

Hostgroup tries to eager load the group parameters but there's an error
in the code that renders the eager loading useless.
Fixes #7032 - Rake backup accepts destination file
refs #7032 - fix documented backup filename