Why limit a user to preset ssh arguments? Capture them all and send
them along to ssh to deal with. This allows users to use the full range of
ssh arguments, including specifying a command to run on the
instance. For example:
openstack server ssh -4 upg -- -l cirros -i ~/id_rsa_upg "date; uptime"
SSH arguments that openstackclient currently mirrors are deprecated
except for -4 and -6, as they are useful for retrieving the correct
instance IP.
Change-Id: Ia50786d5eee52688e180550fe16aeb8af610154b
Co-authored-by: Stephen Finucane <stephen@that.guru>