VOL-4427: Clear stale keys from etcd

Change-Id: I7a78b5bf6fceab6245e79b9372d0dfa91786328c
diff --git a/VERSION b/VERSION
index 3cf5751..fa8da20 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.5.7
+3.5.8