Expanded search for empty string for SDK tracking

Author: gnongsie

CyberSource/utilities/tracking/sdk_tracker.py

@@ -53,7 +53,7 @@ def insert_developer_id_tracker(self, request_obj, request_class, run_environmen
                 tester['client_reference_information'] = {}
             if 'partner' not in tester['client_reference_information']:
                 tester['client_reference_information']['partner'] = {}
-            if 'developer_id' not in tester['client_reference_information']['partner']:
+            if 'developer_id' not in tester['client_reference_information']['partner'] or not tester['client_reference_information']['partner']['developer_id']:
                 tester['client_reference_information']['partner']['developer_id'] = developer_id_value
 
             request_with_tracker = json.dumps(tester)