SEBA-513 Cleanup errors reported by xproto validator

Change-Id: I081534669a8b2ff542dfe9548847f5ff40a47643
diff --git a/VERSION b/VERSION
index 0b6e431..98c938e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.11
+2.2.12