Add monitoring for stuck VMs (#1129)

If RabbitMQ decides to go for a nap, some messages may be stuck
and it may cause certain VMs to be stuck in certain states such
as deleting or building.
This adds monitoring in order to catch if any of those operations
are stuck in the cloud.
Depends-On: #1130
diff --git a/roles/defaults/vars/main.yml b/roles/defaults/vars/main.yml
index dec4745..bf6672b 100644
--- a/roles/defaults/vars/main.yml
+++ b/roles/defaults/vars/main.yml
@@ -174,7 +174,7 @@
   prometheus_memcached_exporter: quay.io/prometheus/memcached-exporter:v0.10.0
   prometheus_mysqld_exporter: quay.io/prometheus/mysqld-exporter:v0.14.0
   prometheus_node_exporter: quay.io/prometheus/node-exporter:v1.7.0
-  prometheus_openstack_database_exporter: ghcr.io/vexxhost/openstack-database-exporter:v0.2.0
+  prometheus_openstack_database_exporter: ghcr.io/vexxhost/openstack-database-exporter:v0.3.0
   prometheus_openstack_exporter: ghcr.io/openstack-exporter/openstack-exporter:1.7.0
   prometheus_operator_kube_webhook_certgen: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v20221220-controller-v1.5.1-58-g787ea74b6
   prometheus_operator: quay.io/prometheus-operator/prometheus-operator:v0.73.0