@Test
  public void testProcessWithKerberos_UpdateKererosConfigProperty_WithNoCustomValue() throws Exception {

    Capture<? extends Set<String>> captureUpdatedConfigTypes = testProcessWithKerberos(null, "defaultTestValue", null);

    Set<String> updatedConfigTypes = captureUpdatedConfigTypes.getValue();
    assertEquals(2, updatedConfigTypes.size());
  }
testConfigType config type should be in updatedConfigTypes, as no custom property in Blueprint
==> Kerberos config property should be updated
@throws Exception
ambari-server/src/test/java/org/apache/ambari/server/topology/ClusterConfigurationRequestTest.java