trivialfix: cleanup _pack_instance_onto_cores()
trivialfix: cleanup _pack_instance_onto_cores()

_pack_instance_onto_cores function received several arguments for
values in objects.NUMACell instance. This patch changes the function
to receive just objects.NUMACell instance for clean up purpose.

Change-Id: Ia7e99a49e5a3e787ffbb2a98100a836cd7b788f0

rahulunair/nova,mahak/nova,mikalstill/nova,gooddata/openstack-nova,mikalstill/nova,phenoxim/nova,gooddata/openstack-nova,mahak/nova,mahak/nova,gooddata/openstack-nova,mikalstill/nova,rahulunair/nova,openstack/nova,klmitch/nova,klmitch/nova,openstack/nova,klmitch/nova,openstack/nova,gooddata/openstack-nova,klmitch/nova,phenoxim/nova,rahulunair/nova