Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to a6e49b16be6136a76b0aa1f170cf6aa79ad765fe
  - Increment version to 1.8.0-SNAPSHOT
    
    Change-Id: Ia39d2dbe393d3ce325abae026e94cd5b761f096c
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1816
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index ca2b258..a6e49b1 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit ca2b2584778bf8e18eda82469f06ef89edbbd9f6
+Subproject commit a6e49b16be6136a76b0aa1f170cf6aa79ad765fe