Updated git submodules

Project: appc master fe7018177079b02ca9a05d76b29a5697284d823b

Artifact Handler code fixes

Code corrections in Artifact Handler to use vnf type to store capability artifact,
process download dg reference even if it is not sent in reference file,
to not generate capability artifact if reference file is at vnfc level

Issue-ID: APPC-271
Change-Id: If7e436576f9c64c3933ea681355e710ebf82c497
Signed-off-by: Ramya Balaji <rb111y@att.com>

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 043892a..fe70181 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 043892a735d5f0cfc762f49d6bea09c8abb671d1
+Subproject commit fe7018177079b02ca9a05d76b29a5697284d823b