Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to d15450419ab00cb77af96f57252012edc5276b98
  - Decommission java and docker manifests
    
    Issue-ID: INT-1128
    Signed-off-by: Gary Wu <gary.wu@futurewei.com>
    Change-Id: Id8b3f228f0813a82e871feb57cc865905dff9988
    
1 file changed