for classic reg test need the batch size info in gen_specs

Author: jlnav

libensemble/tests/regression_tests/test_persistent_aposmm_scipy.py

@@ -65,6 +65,7 @@
         "gen_f": gen_f,
         "persis_in": ["f"] + [n[0] for n in gen_out],
         "out": gen_out,
+        "initial_batch_size": 100,
         "user": {
             "initial_sample_size": 100,
             "sample_points": np.round(minima, 1),