Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Fix VVP test case

    This patch adds check for no environment variables provided to
    container configuration. Furthermore, it changes the check results
    file to a list of check result files.

    Change-Id: I2112ee1fd4b3156608d8a27dd3b9c90dbe35a24c
    Signed-off-by: Stamatis Katsaounis <mokats@intracom-telecom.com>
    Co-Authored-By: Panagiotis Karalis <pkaralis@intracom-telecom.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index f27b138..9bb8508 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit f27b1382a87c432487816cfad6e5c341250d16b2
+Subproject commit 9bb85082e261f5df9dbd0a6bbeb6e315d8f67cdc