Fix privilege error in monit tomcat6 config

The tomcat6 user doesn't have the right privileges to run the
/etc/init.d/tomcat6 script.  Removing these lines allows monit to
restart tomcat if it stops for any reason, and makes the tomcat6 monit
config more consistent with other monit configs elsewhere.
Merge pull request #298 from philandstuff/master

Fix privilege error in monit tomcat6 config