RHV-H upgrade fails with UnicodeEncodeError message

Issue

RHV-H upgrade fails with following error message in imgbase log

2019-02-05 17:57:15,912 [DEBUG] (MainThread) Traceback (most recent call last):
  File "/tmp/tmp.2OVJIs5u2h/usr/lib/python2.7/site-packages/imgbased/utils.py", line 1541, in run
    self._function(*self._args, **self._kwargs)
  File "/tmp/tmp.2OVJIs5u2h/usr/lib/python2.7/site-packages/imgbased/plugins/osupdater.py", line 552, in migrate_etc
    old_fs.path("/") + "/usr/share/factory/etc/")
  File "/tmp/tmp.2OVJIs5u2h/usr/lib/python2.7/site-packages/imgbased/plugins/osupdater.py", line 496, in changed_and_new
    for f in dc.left_only])
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2013' in position 0: ordinal not in range(128)

2019-02-05 17:57:15,912 [DEBUG] (MainThread) Traceback (most recent call last):
  File "/tmp/tmp.2OVJIs5u2h/usr/lib/python2.7/site-packages/imgbased/utils.py", line 1564, in thread_group_handler
    t.join_with_exceptions()
  File "/tmp/tmp.2OVJIs5u2h/usr/lib/python2.7/site-packages/imgbased/utils.py", line 1556, in join_with_exceptions
    raise exc[1]
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2013' in position 0: ordinal not in range(128)