add python api configurations to test .properties file

Author: mspruc

tools/test/config/wayang.properties

@@ -21,3 +21,7 @@ wayang.giraph.job.tracker = localhost:50300
 wayang.giraph.maxWorkers = 1
 wayang.giraph.minWorkers = 1
 wayang.mapreduce.job.counters.limit = 200
+
+# for python api tests
+wayang.api.python.worker = python/src/pywy/execution/worker.py
+wayang.api.python.path = python3