fixes #10989 - removing 1.12 deprecations

Fixes #13664 - rescue smtp errors if mail failed on host built

Fixes #6342 - merge compute profile when attributes in api host#create

API v2 host#craete call now merges user specified compute attributes
with compute profile. UI functionality remains untouched.

fixes #12791 - allow access to boot_files_uri and medium in safe_mode

Fixes #13557 - Rubocop enforce specifying a timezone

Rubocop can enforce what timezone to store in the database ,
so we can ensure everything is stored using UTC and we don't
miss these things in code reviews. When objects are displayed,
they must use the time provided by set_timezone in the...

fixes #13440 - rename Host#model_name to #hardware_model_name

Rails 4.2 defines a model_name instance method which is used in routing
and called from link_to. Rename our model_name methods to
hardware_model_name to prevent this overlapping and causing link_to...

Fixes #13379 - Clear host.last_report when switching to build mode

Use case:

When a server with a Puppet client is rebuilt, foreman cleans the
reports but not the "last report" field.

When you switch a host from a Puppet-enablet hostgroup to a hostgroup...

fixes #13236 - apply power operations to several hosts at once

This commit adds the ability to select multiple hosts and apply power operations
(reboot, shutdown, boot) to them.

Fixes #13107 - compute attributes has indifferent access again

During upgrade to Rails 4.1, our host#create code no longer sends attributes
into the ActiveRecord create/new initializers with indifferent access. One
of these attributes, `compute_attributes` then does not work breaking...

Fixes #13216 - Added ability to extend API by creating facet subnode
This commit adds the ability for plugins to extend Host model with custom data that will be stored in a facet model.
In order to show this data an extension point is added to Host's view API, so the properties list can be extended by the facet....