Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to afad136327003c1a4b8f3a5708e27d96e3374d67
  - Fixes for parameterized sql queries

    The old non-parameterized queries would treat null entries in the SvcLogicContext
    as "null" string values. The parameterized query treats these as NULL sql values.
    This change keeps those values as "null" strings.

    Change-Id: Iee7f7a1861bdd82dc65d59db2be7862b49cf1207
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1639

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index c8783f0..afad136 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit c8783f0346c69d00ca686a07cb418db751598bb2
+Subproject commit afad136327003c1a4b8f3a5708e27d96e3374d67