Clean up test_server_actions_rbac

This PS removes unnecessary helpers from test_server_actions_rbac
that are only used once. Helpers that are used at least twice
are kept.

Helpers were renamed to drop the "_test" prefix as the helpers
themselves do not test anything, but rather invoke server
actions.

Change-Id: Ia9f83517b0ed9cf93af729c856e0adcc68da9314
1 file changed