Update git submodules

* Update docs/submodules/music.git from branch 'master'
  to 787a713e91001278a5258835aaf063cd36335d1b
  - Removed sub-expressions from RestMusicDataAPI
    
    Fixed critical Sonar issue related to identical sub-expressions
    on both sides of operator.
    Added more details to error logger.
    
    Change-Id: I421c4ac3894c08b6b174fdaeb6e68be50e024e63
    Issue-ID: MUSIC-328
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>
    
1 file changed