Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 286805b229460c66a327af25f56fe29e1f5ebcd0
  - Test coverage in RestClientInvoker
    
    Added test for untested class
    Increased test coverage from 0% to 94%
    
    Issue-ID: APPC-1520
    Change-Id: I51610584cd203f5de7286c325332cade6f3c2bd6
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>
    
1 file changed