Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Remove duplicate ubuntu trusty/14.04 os image

    VNF testcase use some Operating System image
    2 of those are the same but not with the same name

    Change-Id: Ide5ae683f606f7f58535c0a59cec45e4a30d225c
    Signed-off-by: Valentin Boucher <valentin.boucher@kontron.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 29a3844..bde5f1f 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 29a384491df24cbace49d822a636c52649264f60
+Subproject commit bde5f1f240817737b15832b6aa555167c5396f46