Enable image building pipelines and disable periodic builds

This commit enables image building and node image building
pipelines and disables periodical builds and builds by push in
repos

Change-Id: I8cb85f746a0af31e04432567cc29319deb5990b3
diff --git a/jjb/metal3/projects.yml b/jjb/metal3/projects.yml
index 8b1d819..b2decb3 100644
--- a/jjb/metal3/projects.yml
+++ b/jjb/metal3/projects.yml
@@ -36,6 +36,8 @@
     - nordix-metal3
     jobs:
     - linter_tests
+    - openstack_image_building
+    - openstack_node_image_building
     - docker_image_building
     - update_nordix_repos
     - main_fullstack_building