Revert "Up the debian-jessie min-ready"
Revert "Up the debian-jessie min-ready"

Now that we have more cloud resources and have started optimizing our
nodepool launcher, we don't actually need more then 1 debian-jessie
node online.  Our boot time are quite reasonable now.

This reverts commit b421e08f897ff95ab58ebd0eecc7ec554ce4a173.

Change-Id: I3407dd4fa0d5988899bfacf4740aa76b81b63e13
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config