Update xvm-munin-config to version 0.0.17

Requested by quentin/root@ATHENA.MIT.EDU

diff --git a/xvm-munin-config b/xvm-munin-config
index b0a7c5b..3efc385 160000 (submodule)
--- a/xvm-munin-config
+++ b/xvm-munin-config
@@ -1 +1 @@
-Subproject commit b0a7c5b6415899fc992c3a61c75c487dc4bc65dd
+Subproject commit 3efc385dc24b198ef5bedc8893f39ca203955858