fixes #13574 - remove DB access from Setting class scope

Plugins tend to register an initialiser before config/initializers/ to
require their own Setting subclasses. This loads them before
config/initializers/foreman.rb, which calls load_defaults on each known...

fixes #11346 - on new host, nic shouldn't try to call matcher

there's no point in doing the call anyway (can, theoretically, use the
fqdn field instead of asking the host) because there shouldn't be any
lookup keys with that host's fqdn, as it's a new host....

Refs #12911 - Fixing colon method calls

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 #13297 - ssh_provision: try keyboard-interactive as well

With password auth try keyboard-interactive as well since (non PAM
based) password authentication might be disabled in sshd_config (as e.g.
on SLES12).

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....

Fixes #13177, #13255 - Extend ProxyStatus to a base class, handle ProxyAPI errors

Fixes #12630 - Facets registration