Revert "Test removal of import workaround. Tests still passed locally…

…... #2319"

This reverts commit 4e8bf40.

ingestion/functions/parsing/argentina/argentina.py

@@ -4,7 +4,18 @@
 import csv
 import json
 import common.ingestion_logging as logging
-import common.parsing_lib as parsing_lib
+
+# Layer code, like parsing_lib, is added to the path by AWS.
+# To test locally (e.g. via pytest), we have to modify sys.path.
+# pylint: disable=import-error
+try:
+    import parsing_lib
+except ImportError:
+    sys.path.append(
+        os.path.join(
+            os.path.dirname(os.path.abspath(__file__)),
+            os.pardir, os.pardir, 'common'))
+    import parsing_lib
 
 logger = logging.getLogger(__name__)