Updated git submodules

Project: policy/engine master 6eb3c7f44a64cc1aebd4bcef6b081073d91bde7b

Use POLICY_LOGS env variable in logging.properties

Some logger.properties have /var/log/onap hard-coded; changed those
to use $POLICY_LOGS.
Other logger.properties had ${POLICY_LOGS} instead of ${{POLICY_LOGS}};
fixed those, too.

Change-Id: I56faf5982abf520ee364b54a3560313d0f15cc2a
Issue-ID: POLICY-784
Signed-off-by: Jim Hahn <jrh3@att.com>

diff --git a/docs/submodules/policy/engine.git b/docs/submodules/policy/engine.git
index 67de016..6eb3c7f 160000 (submodule)
--- a/docs/submodules/policy/engine.git
+++ b/docs/submodules/policy/engine.git
@@ -1 +1 @@
-Subproject commit 67de0163434349c52291e49cc7bbeadcba03747c
+Subproject commit 6eb3c7f44a64cc1aebd4bcef6b081073d91bde7b