Get rid of flush() in create_segment()
Get rid of flush() in create_segment()

The use of flush() can be avoided here and that enables things
like standardattributes to work correctly.

Change-Id: I58deccb6a7b3c382cf191f17fa2d3b76a048d756

noironetworks/neutron,eayunstack/neutron,sebrandon1/neutron,mahak/neutron,mahak/neutron,mahak/neutron,igor-toga/local-snat,openstack/neutron,noironetworks/neutron,cloudbase/neutron,openstack/neutron,eayunstack/neutron,cloudbase/neutron,huntxu/neutron,sebrandon1/neutron,openstack/neutron,huntxu/neutron,igor-toga/local-snat