Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 003dea294fda8a0e4043665dbfe8ff5c3f018d05
  - upgrade async-http-client version

    The installation dependencies can be removed because they
    are not being used anymore.

    Removing the async-http-client from being packaged into the
    installer will remove the security vulnerability.

    Change-Id: I555d083365a87753b6a406b0abf863c689d65449
    Issue-ID: APPC-1538
    Signed-off-by: Taka Cho <takamune.cho@att.com>

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index e99802f..003dea2 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit e99802fda660284a0d47872af2b0f797295341cf
+Subproject commit 003dea294fda8a0e4043665dbfe8ff5c3f018d05