add kill timeout to upstart script
add kill timeout to upstart script

Writing out the metrics to disk can take a while. By default
upstart waits 5 seconds after sending a SIGTERM signal before
sending a SIGKILL signal.  We need to wait much longer then that.

OOM-Killer/metrictank,replay/metrictank,replay/metrictank,OOM-Killer/metrictank,raintank/metrictank,raintank/raintank-metric,raintank/raintank-metric,raintank/raintank-metric,raintank/metrictank,replay/metrictank,OOM-Killer/metrictank,replay/metrictank,raintank/metrictank,raintank/metrictank