Update test_util.py

Author: Gossty

qiita_db/test/test_util.py

@@ -1350,7 +1350,7 @@ def test_minimize_const(self):
         failures_df = qdb.util._resource_allocation_failures(
             self.df, k, a, b, bm, self.col_name, 'MaxRSSRaw')
         failures = failures_df.shape[0]
-        self.assertEqual(bm, qdb.util.mem_model4,
+        self.assertEqual(bm, qdb.util.mem_model3,
                          msg=f"""Best memory model
                                  doesn't match
                                  Coefficients:{k} {a} {b}