Updated git submodules

Project: appc master e551a81ab48b77b5be881699b4176bbc337bbbce

Re-add public declaration

The public declaration of setDbLibService was removed as part of this
(https://gerrit.onap.org/r/#/c/35763/) commit. This caused a failure in
karaf and the appc-common bundle failed to come up. This commit re-adds
public.

Change-Id: Ia6fa5d950b17e4f440a1243d071c90eedc9be818
Signed-off-by: Patrick Brady <pb071s@att.com>
Issue-ID: APPC-731

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 1f03b49..e551a81 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 1f03b498a2bf4c125f8cbd3a0b6a2eddffbbea4f
+Subproject commit e551a81ab48b77b5be881699b4176bbc337bbbce