use scratch space for concourse work dir
concourse/concourse#1045
@@ -64,7 +64,7 @@ webpid=$!
wait_for_proc_port web $webpid 8080
$CONCOURSE worker \
- --work-dir /etc/concourse \
+ --work-dir /scratch/concourse \
--tsa-worker-private-key /etc/concourse/worker \
--tsa-public-key /etc/concourse/tsa-host.pub \
--garden-network-pool 10.255.0.0/22 \
