Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to f173b99450f252da6e938694a31383c4d91db00a
  - Merge "Declare constant for String literal"
  - Declare constant for String literal
    
    Declare constant for String literal cloudify v3 client classes
    
    Issue-ID: SO-1490
    
    Change-Id: I8843bfb7aae5b25c6d9ad201c90a5bf9d3b0d577
    Signed-off-by: Sindhuri.A <arcot.sindhuri@huawei.com>
    
1 file changed