Reduce OVH BHS1 pool size to 120
Reduce OVH BHS1 pool size to 120

OVH is having issues on some hypervisors on OSF aggregate.
As a result, the others hypervisors are under heavy load and some
instances are not able to boot correctly.
To avoid this, I propose to reduce the number of instance to 120 for a
while.

Change-Id: Ic5f4b279e7222e9ec242aeb80e69612d2e6ef70f
Signed-off-by: Arnaud Morin <d07e5db6eddedb1c88c8e4e2f054201dc4f9f225@gmail.com>

openstack-infra/project-config,openstack-infra/project-config