Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 7fbb90dfacc3034432df073faa094a6f4747c210
  - Merge "Replace String literal with constant"
  - Replace String literal with constant
    
    Replace String literal with a constant VnfAdapterNotify_Service class
    
    Issue-ID: SO-1490
    
    Change-Id: Iebcfb6254fce98cc09e772389629bba2af169194
    Signed-off-by: Sindhuri.A <arcot.sindhuri@huawei.com>
    
1 file changed