Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Update rally image name regex"
  - Update rally image name regex

    The default value doesn't conform with our image names.
    Else it downloads the image from internet which may be not possible
    (offline testing, proxy or deployment l3 issues [1])

    [1] https://build.opnfv.org/ci/view/functest/job/functest-apex-virtual-suite-master/113/console

    Change-Id: I7d951967784d591e7155fe8582299aaa9b680b10
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 6bbf007..06ee830 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 6bbf0075ccdeb014eda01c9ab18048e8321f9070
+Subproject commit 06ee8307aed7f30ba493c0494cfd82cead465b56