cancelActivity为true,则interrupting为true
executeInterruptingBehavior会调用deleteChildExecutions(attachedRefScopeExecution, executionEntity, commandContext);把usertask删掉

cancelActivity为true,则interrupting为true
executeInterruptingBehavior会调用deleteChildExecutions(attachedRefScopeExecution, executionEntity, commandContext);把usertask删掉