Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Install vEPC dependencies in Dockerfile"
  - Install vEPC dependencies in Dockerfile

    It also cleans sources and packages.

    Change-Id: Ie3a1a836c27af295b93386e8df63c0ae5accde84
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 2db6217..359ca83 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 2db621767d66b632fab4e2594e4524348484ad56
+Subproject commit 359ca83f394748b258980d9fd827e42cdb0d6e2b