fixes #18238 - use fixed model name in test expectation

fixes #18232 - install phantomjs via npm

Fixes #17681 - Switch to newly created taxonomy

Fixes #18205 - Add save_to_file macro

Fixes #17872 - Update button label from New to Create

Based on PatternFly Terminology and Wording suggestions
Don't recommend to use New, so update New to Create.

Refs #17653 - fix typo in show_hidden_parameters and add tests

Fixes #16752 - Extract template code from Host::Managed

Host::Managed contains a lot of code related with determining the
template that a host should have. Other Host objects such as
Host::Discovered might need that logic, without becoming a
Host::Managed....

fixes #18176 - replace clear_association_cache with reload

Reload is still necessary in Rails 5 as interfaces association will be
cached. The BMC test change is necessary to reload smart proxies
associated to the subnet after their features were altered - previously...

fixes #18199 - empty parameter value is an empty string, not nil

Refs #18143 - extend snippet_if_exists too