Comment 10 for bug 1780726

permission denied issue in promotion logs
+ PROMOTED_HASH=f84ce61bb1e7f9cd62c73cc8c14f01644989c279_1346e217
+ LINK_NAME=current-tripleo
+ sftp_command 'rm /var/www/html/images/queens/rdo_trunk/previous-current-tripleo'
+ echo 'rm /var/www/html/images/queens/rdo_trunk/previous-current-tripleo'
+ sftp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null <email address hidden>
Warning: Permanently added 'images.rdoproject.org,38.145.33.168' (ECDSA) to the list of known hosts.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
Couldn't read packet: Connection reset by peer

2018-07-12 04:34:10,859 8737 ERROR promoter Command '['bash', '/home/centos/ci-config/ci-scripts/promote-images.sh', u'queens', 'f84ce61bb1e7f9cd62c73cc8c14f01644989c279_1346e217', u'current-tripleo']' returned non-zero exit status 255
Traceback (most recent call last):
  File "/home/centos/ci-config/ci-scripts/dlrnapi_promoter/dlrnapi_promoter.py", line 168, in tag_qcow_images
    stderr=subprocess.STDOUT
  File "/usr/lib64/python2.7/subprocess.py", line 575, in check_output
    raise CalledProcessError(retcode, cmd, output=output)

in http://38.145.34.55/queens.log and http://38.145.34.55/master.log