Fix like escaping for DB2, Oracle and MySql (#1162)

* Extended test case to show problem

* FIX: Proper escaping of backslash in like/contains queries

* Had to replace "like ?" assertions in tests with "like " as mysql will do a "like binary ? escape'|'" now to be case sensitive

src/test/java/org/tests/batchload/TestBatchLazyWithCacheHits.java

@@ -78,7 +78,7 @@ public class TestBatchLazyWithCacheHits extends BaseTestCase {
 
     // batch lazy loading into cache
     assertThat(sql).hasSize(2);
-    assertThat(sql.get(0)).contains("from uuone t0 where t0.name like ?");
+    assertThat(sql.get(0)).contains("from uuone t0 where t0.name like ");
     assertThat(sql.get(1)).contains("from uuone t0 where t0.id in (?,");
 
     statistics = beanCache.getStatistics(true);