Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to de191b8ade7bd9abc0770ed4e332b10071026fdb
  - Test coverage for HttpClientTest
    
    Added test coverage for untested class
    Increased coverage from 0% to 89%
    
    Issue-ID: APPC-1520
    Change-Id: I113d515df3b6f6ef12565cf390f0bd2f2e8ac2f0
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>
    
1 file changed