JBPM-4361 - Error while searching for active paths when process reaches 'OR' gateway

(cherry picked from commit 3a8b63fddd66c7885e39089722e9e030768ee2fe)
JBPM-4362 - TaskDeadlinesServiceImpl unschedule method deletes triggers for all active deadlines in all tasks

(cherry picked from commit 189df0f7e184c1a9958fa4ac83941e8d61fe33e3)
BZ1107473 Cannot use Task Comment longer than 256 characters

(cherry picked from commit 02a2943bb05b7c9e0bd77b676ed3b1a60ac80c47)