Fix a keyward arguement error on bay-config
Fix a keyward arguement error on bay-config

The bay-config command passed 'bay_uuid' keyward arguement to create
cert. It should use 'cluster_uuid' instead.

Closes-Bug: #1621131
Change-Id: I0e4aa115db3004c8244bcf6c9b74f35088d8c7e8

openstack/python-magnumclient