Update git submodules

* Update docs/submodules/music.git from branch 'master'
  to 66ee14082f52e7a12940f9b54db406e1ed268e19
  - Merge "Added unit test case"
  - Added unit test case
    
    Added unit test case to reach min coverage limit
    
    Issue-ID: MUSIC-308
    Change-Id: I4b96218d977c176285abe1903bf570e3525a9ce2
    Signed-off-by: Jegadeesh Babu <jegabab1@in.ibm.com>
    
diff --git a/docs/submodules/music.git b/docs/submodules/music.git
index 5f2daee..66ee140 160000
--- a/docs/submodules/music.git
+++ b/docs/submodules/music.git
@@ -1 +1 @@
-Subproject commit 5f2daee789950376b57bd21d04a74260184608b0
+Subproject commit 66ee14082f52e7a12940f9b54db406e1ed268e19