Don't claim that CLI user data requires manual base64 encoding
Don't claim that CLI user data requires manual base64 encoding

python-novaclient automatically encodes user data as base64 before
passing to the API, so don't claim that the user needs to do it,
as discussed on IRC:

http://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-nova.2019-08-05.log.html#t2019-08-05T17:52:41

(Even they did need to, it would have been more helpful to tell
them *how*.)

Change-Id: I20c272e0a5b277652e1cef90d1f9fbb714e173d7

klmitch/nova,klmitch/nova,openstack/nova,klmitch/nova,openstack/nova,rahulunair/nova,rahulunair/nova,klmitch/nova,mahak/nova,mahak/nova,openstack/nova,rahulunair/nova,mahak/nova