Make top level convenience method default to gga_gga_U

Author: Jason Munro

mp_api/client/mprester.py

@@ -883,7 +883,7 @@ def get_entries_in_chemsys(
         inc_structure: bool = None,
         property_data: List[str] = None,
         conventional_unit_cell: bool = False,
-        additional_criteria=None,
+        additional_criteria={"thermo_types": ["GGA_GGA+U"]},
     ):
         """
         Helper method to get a list of ComputedEntries in a chemical system.