How to handle the process_user for custom version of Tomcat

[phaf]

Hello together,

the possibility to set a custom version of Tomcat does not seem to care about the process_user in tomcat::params. This variable will be still set by selecting the OS version. This leads to problems, if you want to install Tomcat6 under Debian 7 (maybe also affect other distributions). Therefore I want to discuss which selection would do the best job. I already patched it for Debian here phafner@0333d77, but maybe there are better ideas on how to solve this issue.
Any opinions?

Cheers,
Patric