Do not run lbaas jobs for doc-only neutron changes
Do not run lbaas jobs for doc-only neutron changes

Noticed when looking at zuul.openstack.org that the lbaas jobs were
being run on a doc patch - https://review.openstack.org/#/c/202569/

Change-Id: Ia963e176a644cd1b7e90ee66c2d3449e4cfe2f6f

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