[AIRFLOW-734] Fix SMTP auth regression when not using user/pass
Closes #1974 from criccomini/AIRFLOW-734
Project: http://git-wip-us.apache.org/repos/asf/incubator-airflow/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-airflow/commit/a6b14814
Tree: http://git-wip-us.apache.org/repo
Repository: incubator-airflow
Updated Branches:
refs/heads/master 794540f95 -> a6b148149
[AIRFLOW-734] Fix SMTP auth regression when not using user/pass
Closes #1974 from criccomini/AIRFLOW-734
Project: http://git-wip-us.apache.org/repos/asf/incubator-airflow/repo
Commit: http://git-wip-us.a