Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Install third-party requirements again

    Change-Id: Ic04969a56a4e35d5caf12a6a9bc0323bcf3a26d2
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index eb864cc..c510c3f 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit eb864cc183005479e4fd00d3b849034fcab5bffc
+Subproject commit c510c3f912fe095af08705eb694bb1f0a226f38c