Update git submodules

* Update docs/submodules/policy/engine.git from branch 'elalto'
  to b6fd4b95bd818a9cc16b9e105bf4914a6fa989a8
  - maven release 1.5.3
    
    Issue-ID: POLICY-2475
    Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
    Change-Id: I413a545d947d064dc8d61938e29002170b1cb300
    
1 file changed