Update git submodules

* Update docs/submodules/appc.git from branch 'dublin'
  to 5a7e36dbde00bda4f13d65252d5447f2bc882407
  - Fix escapeInternalJson method

    The method incorrectly handled cases where the json string contained
    json objects internally. These cases should be handled correctly now.

    Change-Id: I43b40414526bcb6577242ab737097dfb9119e618
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1576
    (cherry picked from commit fc2018739d072a0287b84ff78c94572bce5aba7c)

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 8f397a4..5a7e36d 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 8f397a4c22050bd76262c90a0739cad0ef89d989
+Subproject commit 5a7e36dbde00bda4f13d65252d5447f2bc882407