Airflow Home moved from config to environment variable; python3 set as centos default

Merge pull request #23 from tulibraries/make-airflow-home-envvar

replacing airflow_home from config with envvar, per airflow deprecation warning

Adding no_log: True to hide information from CD logs

v0.0.6

adding no log to avoid any chance of data showing up ni CD logs

Updating airflow variables and connections management

v0.0.5

updating airflow vars & conns task to delete select variables being u…

Fixing CONN typos; adding webserver logging to system; & changing RBAC defaults

v0.0.4

changing default role to Viewer since Public has a bug

Adding DAG system installation support;

v0.0.3

updating travis file to test against multiple environments & release …

Adding Pip and Pipenv support for Worker nodes

Merge pull request #4 from tulibraries/add-dag-git-clone-task

updating DAGs mgnmt task to install DAG pip libraries via Pipenv or Pip requirements

Airflow 1.10 with RBAC & Minimal Worker Setup

Merge pull request #3 from tulibraries/add-dag-git-clone-task

Add dag git clone task