Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to b16ce237d780314ea8bbaf17cdb432bc694ee7e7
  - Fix dg-common bundle error

    Fix a dg-common blueprint error that was caused by the
    changes with the new appc-service-communicator.

    Added an interface for the EventSender, and created a blueprint file
    to publish the interface as a service.

    Change-Id: I37248fcbfa7cfa75e62965dad811b648c336b5e2
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1744

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 790ddb8..b16ce23 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 790ddb83355800cc037ea1ea3ca8610bb78018d5
+Subproject commit b16ce237d780314ea8bbaf17cdb432bc694ee7e7