v4

Changes:

• Updated logging to write into /var/vcap/sys/log/csvn as appropriate to a BOSH VM. Prior to this change, the logs were in the default CSVN location, which was the logs directory and that landed at /var/vcap/store/csvn/data/logs, which would fill up the persistent disk.
• Jetty was not being shut down cleanly (it appears to have spawned as a daemon process, making the captured PID invalid). Switched over to using pkill to find the actual process and kill it.