Updated git submodules

Project: music master 8555fec5906db3ae50c7c92b522a898746c45ff3

removed dependency for javax servlet 2.4

dependencied for 2 versions of javax servlet existed in the pom. So,
removed the dependency for version 2.4. Now, there is only one version,
i.e., 3.0.1.

Issue-ID: MUSIC-212
Change-Id: I16c676ed05da2aaf0527081f6ac3fb4ac5e805b2
Signed-off-by: Sandeep J <sandeejh@in.ibm.com>

diff --git a/docs/submodules/music.git b/docs/submodules/music.git
index c83eecd..8555fec 160000 (submodule)
--- a/docs/submodules/music.git
+++ b/docs/submodules/music.git
@@ -1 +1 @@
-Subproject commit c83eecde0e1caf1d25abb01960aab0b6dbe855bf
+Subproject commit 8555fec5906db3ae50c7c92b522a898746c45ff3