Add nova option osapi_compute_unique_server_name_scope
Add nova option osapi_compute_unique_server_name_scope

Setting this option forces nova-api to check for duplicate
server names either in the project or system-wide.

The default behavior remains the same: duplicate names are allowed.

DocImpact: Adds a new Nova config option

Change-Id: I28baf8c63f9c62f457bfff0a2fb510f0c517a351

n0ano/gantt,n0ano/gantt