putting timestamped output dir back in

tests/integration/test_epi.py

@@ -21,8 +21,8 @@ class TestEpi(unittest.TestCase):
     @staticmethod
     def write_temp_run_config_files():
         nowstring: str = IntegrationTestUtils.get_now_string()
-        # prefix: str = "temp_epi_" + nowstring
-        prefix: str = "temp_epi_2022-11-23_164339"
+        prefix: str = "temp_epi_" + nowstring
+        # prefix: str = "temp_epi_2022-11-23_164339"
         # prefix: str = ""
 
         default_config = IntegrationTestUtils.DEFAULT_CONFIG_FILE_PATH