Missing BetaIndex with this in exec-model

    @Test(timeout = 10000)
    public void testBuildsIndexedMemory() {
        // tests indexes are correctly built
        final String drl =
              "package org.drools.compiler.test\n" +
              "import " + Person.class.getCanonicalName() + "\n" +
              "global java.util.List list\n" +
              "rule test1\n" +
              "when\n" +
              "   $p1  : Person()\n" +
              "   $p2 : String(this == $p1.name)\n" + //indexed
              "then\n" +
              "end\n";

        InternalWorkingMemory wm = (InternalWorkingMemory) getKieSession( drl );
        try {
            final ObjectTypeNode node = KieUtil.getObjectTypeNode(wm.getKnowledgeBase(), Person.class);
            assertNotNull(node);
            final LeftInputAdapterNode liaNode = (LeftInputAdapterNode) node.getObjectSinkPropagator().getSinks()[0];
            final JoinNode             j2      = (JoinNode) liaNode.getSinkPropagator().getSinks()[0];

            SingleBetaConstraints c = (SingleBetaConstraints) j2.getRawConstraints();
            assertTrue(c.isIndexed());
            BetaMemory bm = (BetaMemory) wm.getNodeMemory(j2);
            assertTrue(bm.getLeftTupleMemory() instanceof TupleIndexHashTable);
            assertTrue(bm.getRightTupleMemory() instanceof TupleIndexHashTable);
        } finally {
            wm.dispose();
        }
    }
    public static ObjectTypeNode getObjectTypeNode(final KieBase kbase, final Class<?> nodeClass) {
        final List<ObjectTypeNode> nodes = ((KnowledgeBaseImpl) kbase).getRete().getObjectTypeNodes();
        for (final ObjectTypeNode n : nodes) {
            if (((ClassObjectType) n.getObjectType()).getClassType() == nodeClass) {
                return n;
            }
        }
        return null;
    }