Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Enable invalid-name warnings in tempest modules"
  - Enable invalid-name warnings in tempest modules

    Do not suppress pylint invalid-name warnings but conform the naming
    convention.

    Change-Id: I324d25b3081fe8a366249559b343c1b9cacadb21
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 7598ab7..6770605 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 7598ab763d31ca4f901043722c19635b73f00d3f
+Subproject commit 67706058e7627cd3109e141caf6901be34922910