Update git submodules

* Update docs/submodules/policy/engine.git from branch 'elalto'
  to da0565c3956e6f349c9fda3ffc2efa76eb9160dc
  - point to 1.5.4 released drools artifacts
    
    Issue-ID: POLICY-2475
    Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
    Change-Id: I13039399839faf7ea2c7b7c6ce1a4064fb40edf1
    
1 file changed