Update git submodules

* Update docs/submodules/music.git from branch 'master'
  to b9b6fb0db83390c80eec5a38a051a4cf2e881293
  - Merge "Cleaning up Sonar issues in JerseyConfig"
  - Cleaning up Sonar issues in JerseyConfig

    Unnecessary imports have been removed.
    Formatting done according to ONAP and Google Java Style.

    Issue-ID: MUSIC-321
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>
    Change-Id: I04ed46d1cb5daa601713e1a4ee0e024b7d1ad55d

diff --git a/docs/submodules/music.git b/docs/submodules/music.git
index 787a278..b9b6fb0 160000 (submodule)
--- a/docs/submodules/music.git
+++ b/docs/submodules/music.git
@@ -1 +1 @@
-Subproject commit 787a27889cf735acb7a3e9e3815d3a1897bf77f2
+Subproject commit b9b6fb0db83390c80eec5a38a051a4cf2e881293