Be sure that coupling starts immediately when restarting

Author: Nicola-Fonzi

SU2_PY/FSI_tools/FSI_config.py

@@ -122,3 +122,6 @@ def applyDefaults(self):
         if self._ConfigContent["CSD_SOLVER"] == "IMPOSED":
             self._ConfigContent["AITKEN_RELAX"] = "STATIC"
             self._ConfigContent["AITKEN_PARAM"] = 1.0
+
+        if self._ConfigContent["RESTART_SOL"] == "YES":
+            self._ConfigContent["TIME_TRESHOLD"] = -1