[AIRFLOW-1712][AIRFLOW-756][AIRFLOW-751] Log SSHOperator output
[AIRFLOW-1712][AIRFLOW-756][AIRFLOW-751] Log SSHOperator output

SSHOperator does now write stdout to log, just
like SSHExecutorOperator
did in the past

Closes #2686 from OpringaoDoTurno/bring-ssh-logs-
back

(cherry picked from commit 0ba6ab6e5c5de0257dfc6f542c7396bda5c382b1)
Signed-off-by: Bolke de Bruin <17f52a69a3ba26c79c8a88ef8c1f26312d9cbf0e@xs4all.nl>

Twistbioscience/incubator-airflow,Twistbioscience/incubator-airflow,Twistbioscience/incubator-airflow,Twistbioscience/incubator-airflow