vexxhost: add repos needed for required-projects for devstack

We added DevStack but now all the jobs don't work because all
the required projects are missing.  This includes all of the projects
that I _believe_ should be included to make DevStack jobs work.

Change-Id: Ic6810c66e553bc798d7eb2347e3852204c2bbf8e

zuul/main.yaml

@@ -1523,6 +1523,19 @@
           - include: [job, secret, nodeset]
             projects:
               - openstack/devstack
+          # Include some projects without config for use in
+          # required-projects
+          - include: []
+            projects:
+              - openstack/cinder
+              - openstack/glance
+              - openstack/keystone
+              - openstack/neutron
+              - openstack/nova
+              - openstack/placement
+              - openstack/requirements
+              - openstack/swift
+              - openstack/tempest
 
 - tenant:
     name: zuul