Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Update/Add requirements to run ODL robot CSIT

    It conforms test_odl.py with the new RobotFramework API too.
    It also updates test-requirements.txt as required by the current
    implementation of run_unit_tests.sh.

    Co-Authored-By: Cédric Ollivier <cedric.ollivier@orange.com>
    Change-Id: Ibca0150a40d3b8a3f736be1e9dcbf9ce56af0299
    Signed-off-by: Jamo Luhrsen <jluhrsen@redhat.com>
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 10ed30e..b8b2c01 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 10ed30e26e9510dcdc9563a0eda3b94c0ccb16ad
+Subproject commit b8b2c014b48511486e8cccbcfcaebad843239ac5