updated Maven submodule repository to 1.6.3

diff --git a/maven b/maven
index 348bcd4374e0e0f533d58bf02c341247229e0aa3..eea4aebbfe52ec269c54fe20345052fbebd7e090 160000 (submodule)
--- a/maven
+++ b/maven
@@ -1 +1 @@
-Subproject commit 348bcd4374e0e0f533d58bf02c341247229e0aa3
+Subproject commit eea4aebbfe52ec269c54fe20345052fbebd7e090