Fixed 'openstack-config' commands in compute 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: I31d388958d3756b35081d0d75825138dea2d6a64
Closes-Bug: #1262495
Merge "Fixed 'openstack-config' commands in compute nova.conf"