Bump max-servers to 50 on citycloud-lon1
Bump max-servers to 50 on citycloud-lon1

Change-Id: Ibf6e7ba68567092e45fb77f78f04e5df9a7837fa

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