Fix CI status on both ubuntu/centos

Both changes need to happen in the same patchset.

1/ centos/workaround: make sure Keystone installed before RabbitMQ

We currently have an issue in Puppet OpenStack CI where DIB image for
centos7 has a modified version of /etc/login.defs that allows RabbitMQ
to steal UID of OpenStack packaging (Keystone most often).

While we are investigating that, this patch is a workaround to make sure
we first install Keystone and then RabbitMQ, on centos7 systems.

2/ disable telemetry tests on Ubuntu.
UCA is currently updating Ceilometer / Aodh and tests are broken now.
Let's skip them.

Change-Id: Ibfc3988a4de47c9d7d97159e7d1c0e57d64979ae

fixtures/scenario001.pp

@@ -34,8 +34,21 @@ include ::openstack_integration::gnocchi
 include ::openstack_integration::ceph
 include ::openstack_integration::provision
 
+case $::osfamily {
+  'Debian': {
+    # UCA is being updated and Ceilometer is currently broken
+    $telemetry_enabled = false
+  }
+  'RedHat': {
+    $telemetry_enabled = true
+  }
+  default: {
+    fail("Unsupported osfamily (${::osfamily})")
+  }
+}
+
 class { '::openstack_integration::tempest':
   cinder     => true,
-  ceilometer => true,
+  ceilometer => $telemetry_enabled,
-  aodh       => true,
+  aodh       => $telemetry_enabled,
 }

manifests/init.pp

@@ -6,5 +6,8 @@ class openstack_integration {
     package { 'openstack-selinux':
         ensure => 'latest'
     }
+    # temporary hack to make sure RabbitMQ does not steal UID
+    # of Keystone
+    Package<| title == 'keystone' |> -> Package<| title == 'rabbitmq-server' |>
   }
 }