Releasing version 2.5.5

Change-Id: I1ffbc6394af2fd00f21605b078f90d283c94e401
diff --git a/VERSION b/VERSION
index 20db7e0..0cadbc1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.5-dev
+2.5.5