[AIRFLOW-4963] Avoid recreating task context (#5596)
[AIRFLOW-4963] Avoid recreating task context (#5596)


(cherry picked from commit 6d78d7f1c68a177d38531cf35b42af2a9c2fb2cb)

owlabs/incubator-airflow,owlabs/incubator-airflow,owlabs/incubator-airflow,owlabs/incubator-airflow