changed: use EclMpiSerializer for Schedule

tests/test_ParallelRestart.cpp

@@ -2161,7 +2161,7 @@ BOOST_AUTO_TEST_CASE(Schedule)
                        getRestartConfig(),
                        {{"test", events}});
 
-    auto val2 = PackUnpack(val1);
+    auto val2 = PackUnpack2(val1);
     DO_CHECKS(Schedule)
 #endif
 }