Fixes #6533 - rest-client 1.7.0 dropped Ruby 1.8 support
fixes #6506 - remove x86_64 default for new architecture
Fixes #6357 - ensure JS is loaded so taxonomy_added is defined on user form
fixes #5969 - improve message when deleting virtual machines to indicate delay
Fixes #6549 - Add :tests_to_skip to plugin registration block