Update git submodules

* Update docs/submodules/vvp/documentation.git from branch 'master'
  to c28fbafaf522ef077827ac5cf289a88cbd481c8f
  - [VVP] Added documentation on configuring the GUI via vvp-config.yaml

    This primarily is meant to address allowing users to enable terms and
    conditions acceptance via the new functionality added in El Alto

    Issue-ID: VVP-228

    Change-Id: I2b5c3680facab0652a0415eb73d9558da2ff42ca
    Signed-off-by: Lovett, Trevor <trevor.lovett@att.com>

diff --git a/docs/submodules/vvp/documentation.git b/docs/submodules/vvp/documentation.git
index bf29a46..c28fbaf 160000 (submodule)
--- a/docs/submodules/vvp/documentation.git
+++ b/docs/submodules/vvp/documentation.git
@@ -1 +1 @@
-Subproject commit bf29a4651bff59e27df10caffb14eedb0fbb3900
+Subproject commit c28fbafaf522ef077827ac5cf289a88cbd481c8f