Update git submodules

Update git submodules

* Update docs/submodules/policy/engine.git from branch 'master'
  to 86554962a34c4e7c16821f91a12242a4ffb36368
  - Fix centos build issue

    Seeing this when trying to build in centos:
      10:04:12 [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0,
        Time elapsed: 0.459 s - in
        org.onap.policy.pap.ia.DbAuditCompareEntriesTest
      10:04:12 [INFO]
      10:04:12 [INFO] Results:
      10:04:12 [INFO]
      10:04:12 [ERROR] Failures:
      10:04:12 [ERROR]   XACMLPAPTest.testDummy:907
      10:04:12 [ERROR] Errors:
      10:04:12 [ERROR]   XACMLPAPTest.getDictionary:886 » NullPointer
    	...

    Modified the junit test(s) to create the JPA entities needed
    by integrity audit, which is what was causing the above issues.

    Change-Id: I405798a1946d377770529a99210a1cc57390667f
    Issue-ID: POLICY-1737
    Signed-off-by: Jim Hahn <jrh3@att.com>