Monitoring: add openstack exporter

Sem-Ver: feature
Depends-On: Id868ea6c1d14de8425944244d1243384acd143be
Change-Id: I20a3f92ba3fe264ebe200f510110278628f3add9
diff --git a/playbooks/openstack.yml b/playbooks/openstack.yml
index aff12a8..2f00a3c 100644
--- a/playbooks/openstack.yml
+++ b/playbooks/openstack.yml
@@ -120,6 +120,10 @@
       tags:
         - openstack-helm-horizon
 
+    - role: openstack_exporter
+      tags:
+        - openstack-exporter
+
 - hosts: controllers
   gather_facts: false
   roles: