[OCP 3.10] - Metrics node selector value changing

[netzzer]

Node selector for metrics is changing

- openshift_metrics_cassandra_nodeselector="{'region': 'infra'}"
+ openshift_metrics_cassandra_nodeselector="{ 'node-role.kubernetes.io/infra': 'true' }"

[netzzer]

After testing metrics deployment with OCP 3.10 nodeselector correct options and values are below:

OCP 3.10 metrics nodeselector options and values:

openshift_metrics_hawkular_nodeselector={"node-role.kubernetes.io/infra": "true"}
openshift_metrics_cassandra_nodeselector={"node-role.kubernetes.io/infra": "true"}
openshift_metrics_heapster_nodeselector={"node-role.kubernetes.io/infra": "true"}