Increase OVH and bluebox to 20 servers each
Increase OVH and bluebox to 20 servers each

So far each has been performing as expected.

Change-Id: I8bdd19d61f846199298519b74580f0667cb38574

noorul/os-project-config,Tesora/tesora-project-config,dongwenjuan/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,openstack-infra/project-config,openstack-infra/project-config,noorul/os-project-config