New procedures which break apart finalize_setup_from_service_account()

[joshelser]

We must always call setup_external_functions in upgrade_check.

The three pieces we can now call concurrently (in place of finalize_setup_with_service_account()) are:

• admin.update_reference(text, text, text)
• admin.create_upgrade_check()
• admin.update_sundeck_configuration(text, text, text)

[joshelser]

One minor conflict on rebase