Revert "AMBARI-20140. Adding spark2 to a kerberized cluster with spark1 fails with keytab file does not exist error (Attila Magyar via adoroszlai)"

This reverts commit e1a354b7d912263593c0b8ff406eb230bae4d2f0.

ambari-server/src/main/java/org/apache/ambari/server/serveraction/kerberos/CreateKeytabFilesServerAction.java

@@ -217,8 +217,8 @@ public class CreateKeytabFilesServerAction extends KerberosServerAction {
               }
 
               if (password == null) {
-                if (hostName.equalsIgnoreCase(KerberosHelper.AMBARI_SERVER_HOST_NAME)
-                  || (kerberosPrincipalHostDAO.exists(evaluatedPrincipal, hostEntity.getHostId()) && destinationKeytabFile.exists())) { // same principal can have multiple keytabs, therefore checking if keytab file exists
+                if (hostName.equalsIgnoreCase(KerberosHelper.AMBARI_SERVER_HOST_NAME) || kerberosPrincipalHostDAO
+                  .exists(evaluatedPrincipal, hostEntity.getHostId())) {
                   // There is nothing to do for this since it must already exist and we don't want to
                   // regenerate the keytab
                   message = String.format("Skipping keytab file for %s, missing password indicates nothing to do", evaluatedPrincipal);