Add install-puppet to base playbook

This role manages puppet on the host and should be applied to all
puppet hosts.

The dependent change is required to get the "puppet" group into the
generated inventory for the system-config-run-base test.

Change-Id: I0e18c53836baca743d32abf1bb4b7a3f63c025bb
Depends-On: https://review.openstack.org/596994

.zuul.yaml

@@ -131,6 +131,14 @@
           label: ubuntu-bionic
         - name: centos7
           label: centos-7
+      groups:
+        # We test puppet installation on this group.  Note bionic not
+        # in here as we have no bionic puppeted nodes (yet?)
+        - name: puppet
+          nodes:
+            - trusty
+            - xenial
+            - centos7
     host-vars:
       trusty:
         ansible_python_interpreter: python2

playbooks/base.yaml

@@ -13,6 +13,7 @@
 
 - hosts: "puppet:!disabled"
   roles:
+    - puppet-install
     - disable-puppet-agent
 
 - hosts: "!ci-backup:!disabled"