Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to c36a7706f20773966b08e0a845e451e26097237d
  - Test coverage in ArtifactHandlerClient
    
    Added partial test coverage
    
    Issue-ID: APPC-1436
    Change-Id: Ic2520603b33f735cf1bd816544696c3fa29f0303
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 5d98d5b..c36a770 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 5d98d5ba830ca741451ff2ecd2f6d2c8445f0b26
+Subproject commit c36a7706f20773966b08e0a845e451e26097237d