Update git submodules

* Update docs/submodules/vnfrqts/usecases.git from branch 'master'
  to aec34780cd40ef722d992a4073c6a5090d9024b6
  - Automation adds index.rst
    
    Issue-ID: CIMAN-376
    
    Change-Id: Ib746c24d77ad02170ab395d1e70eca679acec1a1
    Signed-off-by: lf-jobbuilder <releng+lf-jobbuilder@linuxfoundation.org>
    
1 file changed