Description of problem:

While executing the any nova command with --bypass-url, it throw the error ERROR (KeyError): 'versions'. After analyzing a bit, i come to know the below parameter set wrong. 

response_key get sets to "versions" where as it gets set to "servers" when execute without --bypass-url and produce the expected output.

>> /usr/lib/python2.7/site-packages/novaclient/base.py +246
    
$nova --version
6.0.2

 
Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
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Actual results:
[stack@instack ~]$ nova --bypass-url http://192.168.124.20:8774/v2.1/  list

ERROR (KeyError): 'versions'


Expected results:
It should produce the expected output of nova list

Additional info: