Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 0594c412c406b22725b33633299d85587ee03f08
  - Upgrade to Cassandra 3
    
    Creating base dockers suitable for Cassandra 3
    remove cqlsh version
    
    Change-Id: I996bad2341410cdf45c49f191e998acf4781fc5d
    Issue-ID: SDC-2596
    Signed-off-by: shrek2000 <oren.kleks@amdocs.com>
    
1 file changed