Do not run pylint for essex and diablo branches
Do not run pylint for essex and diablo branches

Change-Id: I70cd02941049928918711043f619f8a1fd3a2288
Reviewed-on: https://review.openstack.org/13139
Reviewed-by: James E. Blair <e81a02a9d6405977f63a769d9f6ec8ed9d924325@inaugust.com>
Reviewed-by: Clark Boylan <635fc31d01fa593720982fa0568e87170cedbe2c@gmail.com>
Approved: Clark Boylan <635fc31d01fa593720982fa0568e87170cedbe2c@gmail.com>
Tested-by: Jenkins

open-switch/infra_project-config,anbangr/osci-project-config,anbangr/osci-project-config,Tesora/tesora-project-config,citrix-openstack/project-config,Tesora/tesora-project-config,noorul/os-project-config,openstack-infra/project-config,osrg/project-config,noorul/os-project-config,dongwenjuan/project-config,dongwenjuan/project-config,citrix-openstack/project-config,openstack-infra/project-config,coolsvap/project-config,open-switch/infra_project-config,coolsvap/project-config,osrg/project-config