fixes #14820 - override Rails log level with Foreman::Logging config

The log_level is expected to be explicitly configured in the Rails
config in the production environment.

Fixes #13819 - avoid facts mismatches on import

Fixes #14790 - reloads puppetclass parameters when choosing os and domain

fixes #14810 - change duplicate test class name

refs #14072 - fix test to check correct login return path

fixes #14742 - retrieve template kind labels from plugin regs

Ensures plugin kinds registered in class variables aren't lost when the
TemplateKind class is reloaded.

fixes #14781 - stub network calls for host_build_status_test

Fixes #14072 - Use to_hash when requesting session original_uri

fixes #13244 - update Rails to 4.2.6

- Add responders gem to support class-level respond_to usage
- http://edgeguides.rubyonrails.org/4_2_release_notes.html#respond-with-class-level-respond-to
- Replace foreigner with native Rails 4.2 FK support
- uses a patch from Rails 5 to support Foreigner's...

refs #14691 - user editing self should not change User.current

Rather than changing the behaviour of #to_label to return persisted
data, the User.current object should not be modified with unsaved data
from the form submission or API update.

User.current is used for authz as well as for display purposes, so...