Preserve the current environment in jmxtrans.sh
Should fix #113 - https://github.com/jmxtrans/jmxtrans/pull/113#issuecomment-33805234
Add a header description
* Touch and chmod pidfile. jmxtrans user does not have permissions to write pid file @ /var/run/jmstrans.pid
* Load /etc/default/jmxtrans at last position, ie *after* setting some variables
* Introduce JMXTRANS_USER and JMXTRANS_GROUP
Merge pull request #115 from obazoud/stop_status_load_etc_default

Preserve the current environment in jmxtrans.sh call
Merge pull request #117 from obazoud/debian_init_doc

Add a header description
Merge pull request #118 from obazoud/pid_file_permission

* Touch and chmod pidfile. jmxtrans user does not have permissions to wr...