[hdf5scan] fix scan path when loaded from dictionnary

tomoscan/esrf/hdf5scan.py

@@ -310,8 +310,13 @@ class HDF5TomoScan(TomoScanBase):
             raise ValueError('No hdf5 entry specified')
 
         assert self.DICT_PATH_KEY in data
-        self.path = data[self.DICT_PATH_KEY]
         self._entry = data[self._DICT_ENTRY_KEY]
+        self.master_file = self.get_master_file(data[self.DICT_PATH_KEY])
+
+        if os.path.isdir(data[self.DICT_PATH_KEY]):
+            self.path = data[self.DICT_PATH_KEY]
+        else:
+            self.path = os.path.dirname(data[self.DICT_PATH_KEY])
         return self
 
     @property