Fix JS error when autoHeight option is used

Nebula Grid is now using split container on the client, because of row
header. "renderRowHeight" was not availble in GridRowContainerWrapper.

Change-Id: I698ed83181599bcbb6e3c341765451d06f1c5635
diff --git a/bundles/org.eclipse.rap.rwt/js/rwt/widgets/util/GridRowContainerWrapper.js b/bundles/org.eclipse.rap.rwt/js/rwt/widgets/util/GridRowContainerWrapper.js
index afdecbb..51c35c5 100644
--- a/bundles/org.eclipse.rap.rwt/js/rwt/widgets/util/GridRowContainerWrapper.js
+++ b/bundles/org.eclipse.rap.rwt/js/rwt/widgets/util/GridRowContainerWrapper.js
@@ -63,6 +63,7 @@
   "setRowHeight",
   "setTopItem",
   "renderItem",
+  "renderRowHeight",
   "setToolTip",
   "renderItemQueue",
   "setBaseAppearance",