Update git submodules

* Update docs/submodules/policy/parent.git from branch 'master'
  to ed57ed2df0db5dc0bbf339b6ff51c4279396cba1
  - Add report-aggregate sonar execution

    This seems to bump the xacml-pdp coverage back to where
    it was previously. No effect on common, models, api, pap
    or drools. Potentially this could help engine.

    Not sure exactly how Jacoco now seems to find the coverage.

    Does not solve cross sub-module lack of coverage. Will
    continue investigating.

    Issue-ID: POLICY-2321
    Change-Id: Id71a2f06f30491246504cb2881b94fe11ad5f501
    Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

diff --git a/docs/submodules/policy/parent.git b/docs/submodules/policy/parent.git
index c1935db..ed57ed2 160000 (submodule)
--- a/docs/submodules/policy/parent.git
+++ b/docs/submodules/policy/parent.git
@@ -1 +1 @@
-Subproject commit c1935dba4855c4e2f60ef628eb0cdb663fde64dd
+Subproject commit ed57ed2df0db5dc0bbf339b6ff51c4279396cba1