Update git submodules

* Update docs/submodules/music.git from branch 'master'
  to 48b02dfdc78a6412d568a14b015ccb9439a1dbb5
  - Update locking to use Threadsafe set

    Had to create whole new method for Atomic Lock Creation.
    Added thread safe set to contol lock creation per key.
    Updated the deadlock to use local_quorum
    Removed some uneeded import
    Updated some logging.

    Issue-ID: MUSIC-512
    Signed-off-by: Thomas Nelson (arthurdent3) <nelson24@att.com>
    Change-Id: I7e1a4c34de5dc9a0e90adf30d1f4d1bac698ceae
    Signed-off-by: Thomas Nelson (arthurdent3) <nelson24@att.com>

diff --git a/docs/submodules/music.git b/docs/submodules/music.git
index a681a9e..48b02df 160000 (submodule)
--- a/docs/submodules/music.git
+++ b/docs/submodules/music.git
@@ -1 +1 @@
-Subproject commit a681a9e295dc2b8f35dd42251f795d0079471ac0
+Subproject commit 48b02dfdc78a6412d568a14b015ccb9439a1dbb5