Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 6a470e0ca7b88d529ef14540f0df307c83cbe0ba
  - Vulnerabilities Fix - ParamsHandlerActivator.java
    
    Removed printStackTrace and put logger
    
    Issue-ID: APPC-1399
    Change-Id: I0217b530cde6b6d22b09210eeb65697006d60795
    Signed-off-by: Sudarshan Kumar <sudars19@in.ibm.com>
    
1 file changed