Fixes #10106 - Make tests run in parallel

Run rake parallel:test to run tests in several processes. The gem will
auto split the tests in as many cores as you have available.

Keep in mind running tests in parallel could highlight race conditions
we would've missed otherwise, so some tests might to be fixed to ensure...

Fixes #11625: refactor the ace editor to make it reusable.

Make the ace editor reusable and include it on the global parameters
page.

http://projects.theforeman.org/issues/11625

Fixes #11388 - Popovers display with correct size and dismiss on next click

Fixes #7096 - Adds STI to templates

This commit converts Ptables to be just another type of Template so it
gets the same features as ConfigTemplate. ConfigTemplate was renamed to
ProvisioningTemplate to reflect UI and the name under it's commonly known.

Fixes #10487: Add custom logging support

This change moves away from the Rails logger to the 'logging' gem
to support more configurability of logging. Further, this allows for
the creation of custom loggers that plugins can then create during
registration (with `logger`) or through settings....

Fixes #9824 - missing compute resource assets

Fixes #9606 - ANSI color codes should not be used in production log

Fixes #2135 - During puppet class import, puppet class description box should close itself

Refs #3809 - Remove cops for empty lines

fixes #8925 - support plugin asset manifests beneath app root

This supports Debian packaging where storing the assets manifest.yml beneath
the gem installation directory isn't possible, as bundler manages gem
installations.

Instead, support loading ${app.root}/public/assets/${plugin}/manifest.yml so...