Sync TripleO projects.

Bring the list of TripleO projects inline with governance/projects.yaml

Change-Id: I3e701daa9a69f654014579e4682296de80556d9d

projects/tripleo.json

@@ -1,13 +1,17 @@
 {"name": "tripleo", "subprojects": [
     "openstack-infra/tripleo-ci",
+    "openstack/dib-utils",
     "openstack/diskimage-builder",
     "openstack/os-apply-config",
     "openstack/os-collect-config",
     "openstack/os-cloud-config",
+    "openstack/os-net-config",
     "openstack/os-refresh-config",
     "openstack/python-tuskarclient",
+    "openstack/tripleo-common",
     "openstack/tripleo-heat-templates",
     "openstack/tripleo-image-elements",
+    "openstack/tripleo-puppet-elements",
     "openstack/tripleo-incubator",
     "openstack/tripleo-specs",
     "openstack/tuskar"