Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Setting the document directory structure according to the Plugfest outcome.

    Implemented a directory and file structure that supports the requirements defined
    in the plugfest etherpad: https://etherpad.opnfv.org/p/cvp_tooling_sketch

    Change-Id: Icb7d2db4b0132f2039c680883e173ff5d7fc0120
    Signed-off-by: ChristopherPrice <christopher.price@ericsson.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index acee332..b8722fa 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit acee332cda9fab1315ee1147ab12bc4003f05990
+Subproject commit b8722fae5e61ca71a43f3d69d1d093906b140bbe