Bug 1811527

Description of problem:

after upgrading the hawkular metrics to the latest version the new pvc is getting created with the name gluster-metrics-claim1 instead of using the old pvc gluster-metrics-claim.

Version-Release number of the following components:
rpm -q openshift-ansible
~~~
openshift-ansible-playbooks-3.11.170-2.git.5.8802564.el7.noarch
openshift-ansible-3.11.170-2.git.5.8802564.el7.noarch
openshift-ansible-docs-3.11.170-2.git.5.8802564.el7.noarch
openshift-ansible-roles-3.11.170-2.git.5.8802564.el7.noarch
~~~

How reproducible:
always

we tried adding the complete name of the pvc as [1], the new pvc did not get create but the cassandra pod failed while writing as the uid changed

[1] inventory variables:
~~~
openshift_metrics_cassandra_pvc_name=gluster-metrics-claim
openshift_metrics_storage_volume_name=gluster-metrics-claim
openshift_metrics_cassandra_pvc_prefix=gluster-metrics-claim
~~~


Actual results:
Ansible playbook creating the new volume instead of using the old one:
~~~
TASK [openshift_metrics : Applying /tmp/openshift-metrics-ansible-E1iyMw/templates/hawkular-cassandra-pvc1.yaml] ***
Friday 21 February 2020  16:39:26 +0100 (0:00:00.518)       0:03:20.026 ******* 
ok: [ocp-master-1.nfv.cselt.it]
~~~


Expected results:

After updating/upgrading hawlukar-metrics the existing pvc should be used. 

Additional info:
Attaching the logs from ansible-playbook.