Updated git submodules

Project: policy/engine master b906dff993b018302fdbdf7e2cfecdbb5cada7f7

Made change to validation to reduce complexity

I had this change before Jorge merged the my previous commit for fixing
optimization policy validation and was planning to amend but Jorge was
quicker on the draw :)

Thanks Pam for pointing this out.. a simple way to reduce complexity
that I will use going forward.

Change-Id: I3ab8ae36591c7c69629f36d84261f95c559d0f42
Issue-ID: POLICY-1205
Signed-off-by: Michael Mokry <michael.mokry@att.com>

diff --git a/docs/submodules/policy/engine.git b/docs/submodules/policy/engine.git
index 4947a95..b906dff 160000 (submodule)
--- a/docs/submodules/policy/engine.git
+++ b/docs/submodules/policy/engine.git
@@ -1 +1 @@
-Subproject commit 4947a957b436d4689cdee6faefedd58e69cd7cb0
+Subproject commit b906dff993b018302fdbdf7e2cfecdbb5cada7f7