update test for agnostic.py now in agnostic, not utils

Author: DLWoodruff

Diff for: mpisppy/tests/test_agnostic.py

@@ -8,7 +8,7 @@
 import mpisppy.opt.ph
 from mpisppy.tests.utils import get_solver, round_pos_sig
 import mpisppy.utils.config as config
-import mpisppy.utils.agnostic as agnostic
+import mpisppy.agnostic.agnostic as agnostic
 
 sys.path.insert(0, '../../examples/farmer')
 import farmer_pyomo_agnostic