OraclePlatform update (ANSI row limiting with OFFSET), Oracle11Platform for old behaviour (#1951)

* #1947 - Oracle change to use concat operator rather than function

* #1947 - setMaxRows(1).findIds() under Oracle returns wrong result

* #1950 - Change OraclePlatform to use ANSI row limiting - OFFSET and NEXT ROWS, old platform as Oracle11Platform

* Revert test default to H2

* #1947 - Oracle & Oracle11 platform

src/test/java/org/tests/batchinsert/TestBatchInsertFlush.java

@@ -205,7 +205,7 @@ public class TestBatchInsertFlush extends BaseTestCase {
   }
 
   @Test
-  @IgnorePlatform(Platform.SQLSERVER)
+  @IgnorePlatform({Platform.SQLSERVER, Platform.ORACLE})
   public void noflushWhenIdIsLoaded() {
 
     EbeanServer server = Ebean.getDefaultServer();