monitoring: add ipmi-exporter

Sem-Ver: feature
Change-Id: I0ee9362f3a60c65eada81feee5f4de1af2f4dd12
diff --git a/playbooks/openstack.yml b/playbooks/openstack.yml
index d771604..aff12a8 100644
--- a/playbooks/openstack.yml
+++ b/playbooks/openstack.yml
@@ -32,6 +32,10 @@
       tags:
         - node-feature-discovery
 
+    - role: ipmi_exporter
+      tags:
+        - ipmi-exporter
+
     - role: prometheus_pushgateway
       tags:
         - prometheus-pushgateway