Include nodesets in zuul/nodepool
Include nodesets in zuul/nodepool

We're sharing jobs from the zuul/nodepool repos with the openstack
tenant, so we also need to include nodeset objects which may be
referenced by those jobs.

Change-Id: If468622d21407858c6d2a8b24037501b0ca5fc48

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