Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 587e939a4248e3e5a53b84b9d263c5c47bc6bbc0
  - openecomp-be code coverage increase
    
    Add tests for classes in generator.datatypes.tosca package
    
    Change-Id: Ic21b4e05d15e881016fa5f25113625bc441924c9
    Issue-ID: SDC-2326
    Signed-off-by: Piotr Darosz <piotr.darosz@nokia.com>
    
1 file changed