DBaaS: Cluster Status switches after restart

User impact: 

After restarting PXC cluster, the UI will show cluster as ready eventually, but after few seconds the status switches back to processing couple of times which could be confusing to user

STR:

Install PXC 1.8 operator

curl -sSf -m 30 https://raw.githubusercontent.com/percona/percona-xtradb-cluster-operator/release-1.8.0/deploy/bundle.yaml \| kubectl apply -f -

curl -sSf -m 30 https://raw.githubusercontent.com/percona/percona-xtradb-cluster-operator/release-1.8.0/deploy/secrets.yaml \| sed "s/pmmserver:.*/pmmserver: ${PMM_PASS}/g" \| kubectl apply -f -

Create a 3 node PXC cluster
Restart cluster and check Status

Result:

Status changes to processing
Status changes to ACTIVE
Status changes to processing
Status changes to ACTIVE