Partial revert of e16bdf274c

Reverting dependency changes as Ansible's de-duplication logic only
prevents one role from invoking another role via a dependency once.

roles/bifrost-prepare-for-test/meta/main.yml

@@ -113,10 +113,4 @@ galaxy_info:
   #- packaging
   #- system
   #- web
-dependencies:
+dependencies: []
-- bifrost-create-vm-nodes
-- ironic-install
-- ironic-enroll
-- bifrost-validate-host-for-deploy
-- bifrost-configdrives
-- bifrost-setup-nodes