Adds --debug option to runtestsuite.py
Adds --debug option to runtestsuite.py

This enables the debugger in the test VisTrails's configuration.

Reminder: the test suite does not use the local configuration or
.vistrails directory.

celiafish/VisTrails,minesense/VisTrails,Nikea/VisTrails,hjanime/VisTrails,hjanime/VisTrails,hjanime/VisTrails,celiafish/VisTrails,VisTrails/VisTrails,VisTrails/VisTrails,minesense/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,Nikea/VisTrails,minesense/VisTrails,Nikea/VisTrails,celiafish/VisTrails,minesense/VisTrails,VisTrails/VisTrails,VisTrails/VisTrails,minesense/VisTrails,hjanime/VisTrails,celiafish/VisTrails,Nikea/VisTrails