Exclude version ncclient version 0.5.3 from requirements
Exclude version ncclient version 0.5.3 from requirements

ncclient 0.5.3 is broken so we need to exclude that version from our
requirements.

Change-Id: I0f6eda8d2130cc067e0a45846bc0eb9aefc9f013

openstack/networking-cisco,noironetworks/networking-cisco,openstack/networking-cisco,noironetworks/networking-cisco