Concourse 3.8.0 → 3.9.0
Concourse 3.8.0 → 3.9.0

Lock the stemcell to 3468.22 to sidestep this issue: <https://github.com/concourse/concourse-deployment/issues/46>

fixes:
```
cat /var/vcap/sys/log/garden/garden.stdout.log
...
{"timestamp":"1519577526.711933136","source":"guardian","message":"guardian.api.garden-server.create.failed","log_level":2,"data":{"error":"runc run: exit status 1: container_linux.go:348: starting container process caused \"process_linux.go:402: container init caused \\\"rootfs_linux.go:46: preparing rootfs caused \\\\\\\"permission denied\\\\\\\"\\\"\"\n","request":{"Handle":"57e474f8-ca2d-4ba3-502f-752b318f147d","GraceTime":0,"RootFSPath":"raw:///var/vcap/data/baggageclaim/volumes/live/52d9e371-bf36-420f-54e7-fd392cfe0039/volume","BindMounts":[{"src_path":"/var/vcap/data/baggageclaim/volumes/live/db79bc67-48fd-4dea-45f8-42b712da859b/volume","dst_path":"/etc/ssl/certs"},{"src_path":"/var/vcap/data/baggageclaim/volumes/live/63afed6a-c6ef-40dc-56ba-23c689064fb9/volume","dst_path":"/scratch","mode":1}],"Network":"","Privileged":false,"Limits":{"bandwidth_limits":{},"cpu_limits":{},"disk_limits":{},"memory_limits":{},"pid_limits":{}}},"session":"3.1.27"}}
```

cunnie/deployments,cunnie/deployments