Updated openstack/openstack
Project: openstack/requirements  904686400c0bdcf1fd55b62a8cf9acae17193765
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Add notes about packaging of external libraries

Add notes regarding the packaging of some external libs
which aren't tested in the gate.

Move three libs into that section:
- python-seamicroclient
- hp3parclient
- hplefthandclient

Change-Id: Icdd75b908aa000923ed07df5ead8bcd2bacdc025