Correct help message of '--name' for baymodel-create
Correct help message of '--name' for baymodel-create

This patch corrects help message of name option for baymodel-create.
Typo: 'bay' -> 'baymodel'

Change-Id: I7ab80fe19110fd3dfec2c3084311d7d11e3bce51
Closes-Bug: #1519199

openstack/python-magnumclient