Merge branch 'GONRG-2017_Add_manifest_ingestion_dag_to_test_workflow' into 'master'

GONRG-2017: Add manifest_ingestion test file to repo

See merge request !53

src/dags/manifest_ingestion.py

+"""Temporary DAG for tests."""
+import airflow
+from airflow import DAG
+from airflow.operators.bash_operator import BashOperator
+
+default_args = {
+    "start_date": airflow.utils.dates.days_ago(0),
+}
+
+with DAG(
+    "manifest_ingestion",
+    default_args=default_args,
+    description="The DAG is used for testing Workflow service, it does nothing but returns "
+                "OK status only to Workflow service.",
+    schedule_interval=None
+) as dag:
+    t1 = BashOperator(task_id="echo", bash_command="echo test")