fix data_path for external users

src/run_modules/experiment_setup.py

@@ -50,7 +50,10 @@ class ExperimentSetup(RunEnvironment):
         super().__init__()
 
         # experiment setup
+        if data_path is None:
             self._set_param("data_path", data_path, default=helpers.prepare_host(sampling=sampling))
+        else:
+            self._set_param("data_path", data_path)
         self._set_param("hostname", helpers.get_host())
         # self._set_param("hostname", "jwc0123")
         self._set_param("hpc_hosts", hpc_hosts, default=DEFAULT_HPC_HOST_LIST + DEFAULT_HPC_LOGIN_LIST)