Merge pull request #231 from Sergei-Lebedev/topic/v0.1.x_fix_schedule_complete

v0.1.x CORE: call task complete for schedule

Author: Sergei-Lebedev

src/schedule/ucc_schedule.c

@@ -56,6 +56,7 @@ static ucc_status_t ucc_schedule_completed_handler(ucc_coll_task_t *parent_task,
     self->n_completed_tasks += 1;
     if (self->n_completed_tasks == self->n_tasks) {
         self->super.super.status = UCC_OK;
+        ucc_task_complete(&self->super);
     }
     return UCC_OK;
 }