disable openstack image builds

Currentlu openstack image builds, node image builds and
metal3-dev-tools integration tests are expected to cause network
stability issues, this commit removes those jobs from jenkins.

Change-Id: I0d38da7fa0a8be1e2e734b6bbb17ce700e9b9639
diff --git a/jjb/metal3/projects.yml b/jjb/metal3/projects.yml
index 5a867d6..760ab4f 100644
--- a/jjb/metal3/projects.yml
+++ b/jjb/metal3/projects.yml
@@ -36,16 +36,10 @@
     - nordix-metal3
     jobs:
     - linter_tests
-    - openstack_image_building
     - docker_image_building
     - update_nordix_repos
-    - openstack_node_image_building
     - main_fullstack_building
     - fullstack_building_test
-    - metal3_dev_tools_integration_test:
-        image_os:
-          - ubuntu
-          - centos
     - artifact_cleanup
     repo:
       org: "Nordix"