updated Maven submodule repository to 1.6.1

diff --git a/maven b/maven
index 0257ac6500e6a47e81f2e372c56aebd9b96bfc0d..e7a0bd1b14da446dd06cbb294a8a88aafe4d389d 160000 (submodule)
--- a/maven
+++ b/maven
@@ -1 +1 @@
-Subproject commit 0257ac6500e6a47e81f2e372c56aebd9b96bfc0d
+Subproject commit e7a0bd1b14da446dd06cbb294a8a88aafe4d389d