Change glance haproxy balancing method
Change glance haproxy balancing method

In order to support glance-direct interoperable image import method
we need to send both stage and import request to the same backend,
as it stores stageing image on the local storage by default.

Change-Id: I55a6983351f178bdc1eff9db50039010fa03a58b

openstack/openstack-ansible,stackforge/os-ansible-deployment,openstack/openstack-ansible,stackforge/os-ansible-deployment