Update git submodules

* Update docs/submodules/sdc/sdc-docker-base.git from branch 'master'
  to 42783072f49b10565a54a73f81619dfd9066fc69
  - Bump Base dockers version to 1.6.0
    
    Bump Base Cassandra version to 1.6.0
    Issue-ID: SDC-2595
    
    Signed-off-by: shrek2000 <oren.kleks@amdocs.com>
    Change-Id: Ie7f13a081d6236f1a1fc561dcd1651591d412013
    Signed-off-by: shrek2000 <oren.kleks@amdocs.com>
    
1 file changed