Fixes #22000 - Replace Button component with Patternfly

Fixes #21137 - Register reducers from plugins

This enables registering reducers from plugins.

http://projects.theforeman.org/issues/21137

Fixes #21725 - Move test config to setup file

This moves the redundant test setup code to a single file.

http://projects.theforeman.org/issues/21725

Fixes #21624 - eslint update to airbnb-base

Replace existing custom rules with airbnb-base config.
Eventually we'll want to to move to the full airbnb config
with react and a11y.

http://projects.theforeman.org/issues/21624

Fixes #21630 - Add colocation for storybook stories

This moves the storybooks stories to colocate with the
corresponding component file. This makes it a little
nicer to manage and follows the pattern in the patternfly-react
repository.

http://projects.theforeman.org/issues/21630

Fixes #21160: Upgrade to React@16

This PR is to prepare for and merge React@16.0.0

The current Foreman code is compliant with React@15.6.2
which means everything should work with React@16.

http://projects.theforeman.org/issues/21160

Fixes #21179 - Upgrade to enzyme@3.0.0

Enzyme needs to be upgraded to support react@16. In upgrading I
found that using jest's snapshot feature would greatly improve
several of the tests that were in place. I've changed these
tests to use snapshots and added enzyme-to-json to support...

fixes #4509 - VMWare: multiple scsi controllers