Cannot upgrade image based RHV host from rhvh-4.1-0.20180410.0 to rhvh-4.1-0.20180426.0. Post script fails.

Issue

• Upgrade fails, cannot upgrade image based RHV Host from rhvh-4.1-0.20180410.0 to rhvh-4.1-0.20180425.0. Post script fails.
• Failed to upgrade RHV Host from RHVH-4.1-20180410.0 to RHVH-4.1-20180426.0

Snip from `/tmp/imgbased.log` from affected host: 

 [DEBUG] (remediate_etc) Copying /tmp/mnt.RcYNR//usr/share/factory/etc/redhat-access-insights/redhat-access-insights.conf to /tmp/mnt.RcYNR///etc/redhat-access-insights/redhat-access-insights.conf
 [DEBUG] (remediate_etc) Calling binary: (['umount', '-l', u'/tmp/mnt.RcYNR'],) {}
 [DEBUG] (remediate_etc) Calling: (['umount', '-l', u'/tmp/mnt.RcYNR'],) {'close_fds': True, 'stderr': -2}
 [DEBUG] (remediate_etc) Returned: 
 [DEBUG] (remediate_etc) Calling binary: (['rmdir', u'/tmp/mnt.RcYNR'],) {}
 [DEBUG] (remediate_etc) Calling: (['rmdir', u'/tmp/mnt.RcYNR'],) {'close_fds': True, 'stderr': -2}
 [DEBUG] (remediate_etc) Returned: 
 [DEBUG] (remediate_etc) Calling binary: (['umount', '-l', u'/tmp/mnt.0bo46'],) {}
 [DEBUG] (remediate_etc) Calling: (['umount', '-l', u'/tmp/mnt.0bo46'],) {'close_fds': True, 'stderr': -2}
 [DEBUG] (remediate_etc) Returned: 
 [DEBUG] (remediate_etc) Calling binary: (['rmdir', u'/tmp/mnt.0bo46'],) {}
 [DEBUG] (remediate_etc) Calling: (['rmdir', u'/tmp/mnt.0bo46'],) {'close_fds': True, 'stderr': -2}
 [DEBUG] (remediate_etc) Returned: 
Traceback (most recent call last):
  File "/tmp/tmp.8f5sjDh0DP/usr/lib/python2.7/site-packages/imgbased/utils.py", line 1487, in thread_group_handler
    t.join_with_exceptions()
  File "/tmp/tmp.8f5sjDh0DP/usr/lib/python2.7/site-packages/imgbased/utils.py", line 1479, in join_with_exceptions
    raise exc[1]
Error: `/tmp/mnt.RcYNR//usr/share/factory/etc/redhat-access-insights/redhat-access-insights.conf` and `/tmp/mnt.RcYNR///etc/redhat-access-insights/redhat-access-insights.conf` are the same file
2018-05-10 16:43:19,847 [DEBUG] (MainThread) None
2018-05-10 16:43:19,847 [ERROR] (MainThread) Failed to migrate etc
Traceback (most recent call last):
  File "/tmp/tmp.8f5sjDh0DP/usr/lib/python2.7/site-packages/imgbased/plugins/osupdater.py", line 108, in on_new_layer
    thread_group_handler(threads, ConfigMigrationError)
  File "/tmp/tmp.8f5sjDh0DP/usr/lib/python2.7/site-packages/imgbased/utils.py", line 1490, in thread_group_handler
    sys.exit(1)
SystemExit: 1