Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to a50a09dea0d53b6f128ba25c93d22720d3242453
  - Added Junit For VNFResolverDataReader
    
    Added Junit Class for VNFResolverDataReader
    
    Issue-ID: APPC-1372
    Change-Id: I8236c89f95ffe6ffb61954456a7bab09082e47b2
    Signed-off-by: Sudarshan Kumar <sudars19@in.ibm.com>
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 22dda4c..a50a09d 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 22dda4cc12bf4551db0b9b5ca013abdb93fadeed
+Subproject commit a50a09dea0d53b6f128ba25c93d22720d3242453