Description of problem:
If a user runs the 'subscription-manager-cli unsubscribe' command sans arguments, they will receive the following traceback:

[root@iolo ~]# subscription-manager-cli unsubscribe
Traceback (most recent call last):
  File "/usr/sbin/subscription-manager-cli", line 69, in <module>
    sys.exit(abs(main() or 0))
  File "/usr/sbin/subscription-manager-cli", line 60, in main
    return managercli.CLI().main()
  File "/usr/share/rhsm/managercli.py", line 336, in main
    cmd.main()
  File "/usr/share/rhsm/managercli.py", line 67, in main
    self._do_command()
  File "/usr/share/rhsm/managercli.py", line 204, in _do_command
    if not self.options.pool:
AttributeError: Values instance has no attribute 'pool'

Version-Release number of selected component (if applicable):
subscription-manager-0.14-1.i686.rpm

How reproducible:
Always

Steps to Reproduce:
1. Run 'subscription-manager-cli unsubscribe'
  
Actual results:
As above

Expected results:
No traceback

Additional info: