@Test
  public void addAmbariServerIdentity_MissingProperty() throws Exception {
    addAmbariServerIdentity(Collections.singletonMap("not_create_ambari_principal", "value"));
  }
Tests that when regenerating keytabs for an upgrade, that the retry allowed
boolean is set on the tasks created.

@throws Exception
ambari-server/src/test/java/org/apache/ambari/server/controller/KerberosHelperTest.java