BZ-1047928 - Web Process Designer Simulation reports blank, dis-functional

(cherry picked from commit ffdef0b23c47cf0b42f6b16a3a588fbb897890b3)
BZ-1047884 - NPE in server.log during simulation of process with Intermediate Events

(cherry picked from commit 171f6e38304630bfebab1a095637d8b3b27ef1cb)