RulesEngine listeners are not invoked when registered in an InferenceRulesEngine

[fmbenhassine]

As of v3.3.0, when a RulesEngineListener is registered in an InferenceRulesEngine, it is not invoked when firing the rules. Here is a failing test:

    @Test
    public void testRulesEngineListener() {
        // Given
        class StubRulesEngineListener implements RulesEngineListener {

            private boolean executedBeforeEvaluate;
            private boolean executedAfterExecute;

            @Override
            public void beforeEvaluate(Rules rules, Facts facts) {
                executedBeforeEvaluate = true;
            }

            @Override
            public void afterExecute(Rules rules, Facts facts) {
                executedAfterExecute = true;
            }

            private boolean isExecutedBeforeEvaluate() {
                return executedBeforeEvaluate;
            }

            private boolean isExecutedAfterExecute() {
                return executedAfterExecute;
            }
        }
        
        Facts facts = new Facts();
        facts.put("foo", true);
        DummyRule dummyRule = new DummyRule();
        Rules rules = new Rules(dummyRule);
        StubRulesEngineListener rulesEngineListener = new StubRulesEngineListener();

        // When
        InferenceRulesEngine rulesEngine = new InferenceRulesEngine();
        rulesEngine.registerRulesEngineListener(rulesEngineListener);
        rulesEngine.fire(rules, facts);

        // Then
        // Rules engine listener should be invoked
        assertThat(rulesEngineListener.isExecutedBeforeEvaluate()).isTrue();
        assertThat(rulesEngineListener.isExecutedAfterExecute()).isTrue();
        assertThat(dummyRule.isExecuted()).isTrue();
    }