## What changes were proposed in this pull request? Disable Kerberos from Ambari UI didn't clean up keytab directories,
stderr: ``` 2018-09-08 05:27:19,276 - Failed to remove identity for amsmon/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,298 - Failed to remove identity for amsmon/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,325 - Failed to remove identity for amsmon/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,348 - Failed to remove identity for amsmon/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,465 - Failed to remove identity for dn/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,491 - Failed to remove identity for dn/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,515 - Failed to remove identity for dn/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,539 - Failed to remove identity for dn/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,671 - Failed to remove identity for hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,696 - Failed to remove identity for hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,723 - Failed to remove identity for hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,744 - Failed to remove identity for hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,959 - Failed to remove identity for nm/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:19,987 - Failed to remove identity for nm/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,049 - Failed to remove identity for nn/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,376 - Failed to remove identity for HTTP/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,399 - Failed to remove identity for HTTP/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,420 - Failed to remove identity for HTTP/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,441 - Failed to remove identity for HTTP/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,590 - Failed to remove identity for yarn-ats-hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,617 - Failed to remove identity for yarn-ats-hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,647 - Failed to remove identity for yarn-ats-hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,677 - Failed to remove identity for yarn-ats-hbase/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,768 - Failed to remove identity for zookeeper/[email protected] from the Ambari database - Object: null is not a known Entity type. 2018-09-08 05:27:20,798 - Failed to remove identity for zookeeper/[email protected] from the Ambari database - Object: null is not a known Entity type ``` ``` [root@ctr-e138-1518143905142-467151-01-000002 ~]# ls -lrt /etc/security/keytabs/ total 56 -rw-r----- 1 ambari-qa hadoop 318 Sep 7 23:00 kerberos.service_check.090718.keytab -r-------- 1 slava slava 353 Sep 7 23:05 ambari.server.keytab -r--r----- 1 root hadoop 538 Sep 7 23:05 spnego.service.keytab -r-------- 1 cstm-ams hadoop 548 Sep 7 23:05 ams-monitor.keytab -r-------- 1 cstm-hdfs hadoop 533 Sep 7 23:05 nfs.service.keytab -r--r----- 1 cstm-hbase hadoop 338 Sep 7 23:05 hbase.headless.keytab -r-------- 1 yarn-ats hadoop 328 Sep 7 23:05 yarn-ats.hbase-client.headless.keytab -r-------- 1 cstm-hdfs hadoop 528 Sep 7 23:05 dn.service.keytab -r-------- 1 yarn-ats hadoop 588 Sep 7 23:05 yarn-ats.hbase-regionserver.service.keytab -r--r----- 1 ambari-qa hadoop 333 Sep 7 23:05 smokeuser.headless.keytab -r-------- 1 cstm-hbase hadoop 543 Sep 7 23:05 hbase.service.keytab -r-------- 1 cstm-hdfs hadoop 528 Sep 7 23:05 nn.service.keytab -r-------- 1 yarn-ats hadoop 588 Sep 7 23:05 yarn-ats.hbase-master.service.keytab -r-------- 1 cstm-hdfs hadoop 333 Sep 7 23:05 hdfs.headless.keytab ``` This occurred for several reasons related to many iterations of changes to the Kerberos enable and clean up processes. This patch attempts to fix the inconsistencies the lead to the cleanup failures - whether a service, component, or host was removed or Kerberos was being disabled. Now the keytab files, principals/accounts, and Ambari DB records are being properly cleaned up. This was cherry-picked from #2334 ## How was this patch tested? Manually tested various scenarios when Kerberos was enabled - remove a service - remove a component - move a component - remove a host - regenerate keytab files - regenerate missing keytab file - disable Kerberos - Ambari upgrade - stack upgrade Unit tests were updated and all passed. Please review [Ambari Contributing Guide](https://cwiki.apache.org/confluence/display/AMBARI/How+to+Contribute) before opening a pull request. [ Full content available at: https://github.com/apache/ambari/pull/2335 ] This message was relayed via gitbox.apache.org for [email protected]
