Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Fix pylint warnings in testcase_base

    It takes into account the following warnings:
      - bare-except
      - unused-argument
      - broad-except

    Change-Id: I3a50bf6d07823edc80a7f0f78f46681ace7f4a39
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit e4d7506a5a21550a89f897dfaea3f0dcae352e5b)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 609ecc2..3e3d3ed 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 609ecc2f8f326eea24107fc89fdd0ae73a480ab3
+Subproject commit 3e3d3ed62d87eb5ff8bc4860c328f218b0f67315