Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to e51fa00446f6a8bc4d01a433d2ebaa11a08a1b9f
  - Merge "Define constant in place of literals Constants are declared and used in place of literals Issue-ID: SO-1490"
  - Define constant in place of literals
    Constants are declared and used in place of literals
    Issue-ID: SO-1490
    
    Change-Id: I8891e3aad24b29b4c951d995df0192437304d06e
    Signed-off-by: h00397475 <hena.choudhury@huawei.com>
    
1 file changed