Correct brick-cinderclient-ext functional job node
Correct brick-cinderclient-ext functional job node

The gate-brick-cinderclient-ext-dsvm-functional job was instantiated
with a node parameter of "devstack-trusty" (which no longer exists).
Correct this to use our modern "ubuntu-trusty" nodes.

Change-Id: Iee7137904d5e4bdc9d6911542a9a8e8fb6995400

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