Include placement::api class

Explicitly needed post [1].

Also remove epel release rpms to avoid builds
being mixed with RDO repos and causing issues.

[1] https://review.opendev.org/c/openstack/puppet-placement/+/801268

Change-Id: I6adf1d8dd104dbd31d49bd1f5c8ec72444cd1a61

packstack/puppet/modules/packstack/manifests/placement.pp

@@ -20,6 +20,7 @@ class packstack::placement ()
     }
 
     include placement::db::sync
+    include placement::api
 
     class { 'placement::wsgi::apache':
       bind_host => $bind_host,

playbooks/packstack-centos8-pre.yaml

@@ -15,8 +15,8 @@
           set -e
           set -x
           rm -rf /etc/yum.repos.d/delorean*
-          # Remove epel repos
-          rm -rf /etc/yum.repos.d/epel*
+          # Remove epel repos and release rpms
+          rm -rf /etc/yum.repos.d/epel* && dnf remove -y epel*
           dnf clean all
           sudo sed -i '/^exclude.*/d' /etc/dnf/dnf.conf
           dnf -y install libxml2-devel libxslt-devel ruby-devel zlib-devel