Connections from airflow-worker can be long-lived (e.g. when applying
large Armada manifests), and are prone to disconnection due to network
inactivity.
This change uplifts the Armada client to enable socket keepalives in
order to avoid this issue. (Promenade is also uplifted to address a
requirements conflict.)
Change-Id: I067a5edbbdff06f45394e772ebb16d5012987b6c