Update git submodules

* Update docs/submodules/vvp/documentation.git from branch 'master'
  to 2872e33beeb77c8563bf587ed0164b0d412e178f
  - Migrate vvp-documentation docs
    
    Merging this will create
    https://onap-vvp-documentation.readthedocs.io
    This build will run in parallel
    to the current docs generation method
    until we are ready to cut over.
    
    Issue-ID: CIMAN-364
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
    Change-Id: I4fa42aede569af1e528421e7cbae917a63adb9ba
    
1 file changed