AMBARI-3296. SSH key in logs (Vitaly Brodetskyi via dlysnichecnko)
Revert "AMBARI-3288. Upon executing the "hdfs" command, a stack trace appears. (Dmytro Shkvyra via odiachenko)"

This reverts commit 632ebf74facd89138d178e3d8a7f3eb96c91d8ce.