rhn_register fails with "ImportError: No module named hardware_hal"

Issue

• rhn_register fails with following traceback:

# rhn_register
Traceback (most recent call last):
File "/usr/sbin/rhn_register", line 26, in <module>
   from up2date_client import tui
File "/usr/share/rhn/up2date_client/tui.py", line 29, in <module>
   import rhnreg, hardware
File "/usr/share/rhn/up2date_client/rhnreg.py", line 22, in <module>
   import hardware
File "/usr/share/rhn/up2date_client/hardware.py", line 40, in <module>
   from hardware_hal import check_hal_dbus_status, get_hal_computer, read_hal
ImportError: No module named hardware_hal

• We are getting following message in /var/log/messages

python: abrt: detected unhandled Python exception in /usr/share/rhn/up2date_client/hardware.py