Fixed 'openstack-config' commands in controller nova.conf

Corrected section from 'DEFAULT' to 'keystone_authtoken' for the
following keys: auth_host, admin_user, admin_tenant_name,
admin_password

Added commands for the following keys: auth_protocol, auth_port

Change-Id: I3f81e4055f50c32f9ccd941e2ae2d3e6fba25a19
Closes-Bug: #1261927
(cherry picked from commit 5ddc758384b7d4d4f64279d097f96b4e3cfff334)
Merge "Fixed 'openstack-config' commands in controller nova.conf" into stable/havana