Add "direction" parameter to QosBandwidthLimitRule
Add "direction" parameter to QosBandwidthLimitRule

Added document reference for new parameter "direction" in
bandwidth limit rule.

Because this new parameter is supported only by OpenStack Python
Client, all command inputs and outputs were updated too for
consistency.

Change-Id: If7069374c67f865a2284c3ecb81ad2a14b14f691
Closes-Bug: #1687392
Closes-Bug: #1690750

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals