Merge branch 'trufflehog-whitelist' into 'development'

Add trufflehog whitelist file

See merge request !17

trufflehog-config.yaml

+skip_strings:
+  # will only be skipped in corresponding files
+  rootfs/opt/bitnami/scripts/libairflow.sh:
+    - 'airflow_conf_set "celery" "broker_url" "redis://${redis_user}:${redis_password}@${REDIS_HOST}:${REDIS_PORT_NUMBER}/1"'
+skip_paths:
+  - trufflehog-config.yaml