Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 8c06462b211d573926ee1101759d818f846ea7f5
  - Change identifier in database query
    
    Future release of MariaDB adds a keyword currently used as an
    identifier
    
    Issue-ID: APPC-1548
    Change-Id: I4ced052e6acb816797024f5581f14f5f969d357f
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 6e87544..8c06462 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 6e87544710647d9d1e55f3e8a72fe361d244e8b7
+Subproject commit 8c06462b211d573926ee1101759d818f846ea7f5