selectively choose help options -? -h --help based on RHEL release
added blockedByBug-924919
WARNING:rhsm-app.subscription_manager.isodate:dateutil module not found,
trying pyxml
added WORKAROUND for blockedByBug 919584 - 'ascii' codec can't decode
byte 0xc3 in position 3: ordinal not in range(128)