Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Remove former cmd instance attribute

    It's now useless as it's passed as run() args.

    Change-Id: I97e14bd431a8844cd90905bf2050c48fb00f1cc5
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index d45a7d4..d56468b 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit d45a7d4c2723d1d771b026d8c4b36b6a7d4d41ed
+Subproject commit d56468b230c53f8fd9327cd73e0d270d3d73c3d9