Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Generate API doc rst files

    It also fixes few docstrings

    Change-Id: I10bae7b7fab40edd931dd55ab8859946e3b38a71
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
  - Publish Functest doc online

    It reverts Sphinx theme to the default one as it's hugely better for
    API docs.

    Change-Id: Ic489e9b65d67d71fadb8ef78176a04cc382a3f5d
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index f90748a..9008030 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit f90748aef2f8874f10a0968519ad06f4e3426a74
+Subproject commit 90080307c68683f352be2cad48c8371c746d4788