Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 82f572688d0d9335bdea0cb323668cb128b030c3
  - added file to test SDCArtifact.java
    
    to increase code coverage
    
    Issue-ID: APPC-1086
    Change-Id: Id50d1ae6dd6323a6f3f0cb5a225cb141f143019c
    Signed-off-by: Sandeep J <sandeejh@in.ibm.com>
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 498bb01..82f5726 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 498bb01533ee88fd4884153529eb02597335a308
+Subproject commit 82f572688d0d9335bdea0cb323668cb128b030c3