better file names fit files

rowers/models.py

@@ -2507,10 +2507,12 @@ class PlannedSession(models.Model):
             steps = steps_read_fit(os.path.join(settings.MEDIA_ROOT,self.fitfile.name))
             self.steps = steps
 
+
         if self.steps and not self.fitfile:
             filename = 'aap.fit'
             filename = get_file_path(self,filename)
 
+
             steps = self.steps
             steps['filename'] = os.path.join(settings.MEDIA_ROOT,filename)
             fitfile = steps_write_fit(steps)