Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to c3719d87ad36bd1fae457f34ec8aa3247915dc6f
  - Add ConfigModify to if statement

    Requests from cdt with the action set to ConfigModify
    did not have entries added to the device interface
    protocol table. With this change the entry will be
    made in the table.

    Change-Id: I29835554a0ebf2fea29f1c8745b99ac1813c0d7d
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1593

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 298a8f5..c3719d8 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 298a8f5143c8ce87094770f68dfbbcc39ef14553
+Subproject commit c3719d87ad36bd1fae457f34ec8aa3247915dc6f