conf.execute should not be used to get the value
conf.execute should not be used to get the value

This sometimes caused vistrail files to be wrongly executed when opened

core/application.py:
 - processInteractiveInput:
   Use .check() and not .execute to get execute value from configuration

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