Fix: Race between layer and Lambda update (#5927)

Author: dsotirho-ucsc

src/azul/terraform.py

@@ -708,6 +708,10 @@ def tf_config(self, app_name):
         for resource in resources['aws_lambda_function'].values():
             assert 'layers' not in resource
             resource['layers'] = ['${aws_lambda_layer_version.dependencies.arn}']
+            # Publishing the Lambda function as a new version prevents possible
+            # race conditions when an update to the function's configuration and
+            # code rely on the update of each other in order to work correctly.
+            resource['publish'] = True
             env = config.es_endpoint_env(
                 es_endpoint=(
                     aws.es_endpoint