Openstack client now defaults to unlimited max-width
instead of the previous fit-to-terminal width. As a
result, many commands have very wide and unreadable
output. This change fixes the issue by setting a
default max width of 80 (traditional terminal width).
User still has the option to set a different max-width
or specify --fit-width to fit to terminal width.
Change-Id: I5898639942bd4eb17b69c403277b46eb69951265