zookeeper.out grows without bound in dcos

[mnp]

Zookeeper hardcodes that file where the default appender in zkServer.sh is redirecting.
We probably want container stdout instead so the Mesos rotation will handle it.

root@ip-10-0-3-97:/opt/zookeeper/bin# ls -l $MESOS_SANDBOX/
total 29753312
drwxr-xr-x. 4 root root          43 Mar 29 20:03 data
-rw-r--r--. 1 root root         596 Apr 18 15:28 stderr
-rw-r--r--. 1 root root         255 Apr 18 15:28 stderr.logrotate.conf
-rw-r--r--. 1 root root         276 Apr 18 15:28 stderr.logrotate.state
-rw-r--r--. 1 root root        7552 Apr 25 15:32 stdout
-rw-r--r--. 1 root root         255 Apr 18 15:28 stdout.logrotate.conf
-rw-r--r--. 1 root root         276 Apr 18 15:28 stdout.logrotate.state
-rw-r--r--. 1 root root 28693695175 Apr 25 19:08 zookeeper.out