Fixes #13755 - allow reading of AR collections with safe mode enabled

Fixes #13257 - nested locations can be created via api

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 #12873 - update Rails to 4.1.14.1

maintain_test_schema! changed behaviour and now launches db:test:prepare
in the background, causing the environment to be loaded again. A check
in the initializer prevents this from happening recursively.

Ideally this call would be removed from the initializers and leave it to...

fixes #13647 - change puppet ca proxy for several hosts at once

Fixes #13554 - Setting releated to taxonomies shouldn't be shown if they are disabled

fixes #12436 - as a user I want to deploy vSphere vms on a storage pool

fixes #13494 - change puppet proxy for several hosts at once

This commit adds the possibility to select multiple
hosts and change the puppet proxy for them.

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 #13386 - Adds taxonomy parameters objects