Description of problem:
See $subject

Version-Release number of selected component (if applicable):
BPM Suite 6.2.0

How reproducible:

always
Steps to Reproduce:
1. Model a process start->task->end

and put '&' sign in the Task Name
2. Try to export this process as PDF
3. It fails with following exception:
https://gist.github.com/agiertli/427a256c2a21e1b0571b
Actual results:
Exporting PDF of a process including '&' in a Task Name fails

Expected results:
Exporting PDF of a process including '&' in a Task Name succeeds

Additional info:
Look into similar issue with other export (i.e. svg) too