message: Change oc to kubectl and other improvements according to review
diff: @@ -19,12 +19,12 @@ describe('Check data on Storage Dashboard.', () => {
  });
  it('Check that cluster name is correct', async() => {
  - const cephClusterName = execSync('oc describe cephcluster -n openshift-storage|sed -n "s/^Name: \\+//p"');
  + const cephClusterName = execSync("kubectl get cephcluster -n openshift-storage -o jsonpath='{.items..metadata.name}'");
  expect(clusterName.getText()).toEqual(cephClusterName.toString().trim());
  });
  it('Check the total number of OCS nodes', async() => {
  - const ocsNodesNumber = execSync('oc describe nodes|grep -c cluster.ocs.openshift.io/openshift-storage');
  + const ocsNodesNumber = execSync("kubectl get nodes -l cluster.ocs.openshift.io/openshift-storage -o json | jq '.items | length'");
  expect(allNodes.getText()).toEqual(`${ocsNodesNumber.toString().trim()} Nodes`);
  });
  