Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to e83cc6cf6c3025eec2b4d1ebcaec8664dc8667a2
  - Added test case for Flow Controller Activator
    
    Increased the code coverage from 0% to 97%
    
    Issue-ID: APPC-1429
    Change-Id: Iada494daad7939b00c76fead73be864c6b40e045
    Signed-off-by: Lathishbabu Ganesan <lathishbabu.ganesan@ericsson.com>
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 740301e..e83cc6c 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 740301e3f453100ef5fc9555ca32b7d577163850
+Subproject commit e83cc6cf6c3025eec2b4d1ebcaec8664dc8667a2