Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Make rally support https insecure deployment"
  - Make rally support https insecure deployment

    When running in https environment, rally should support insecure
    deployment if no cacert file is provided.

    JIRA: FUNCTEST-828

    Change-Id: I29b0fc8c2e1b74a1ce08293706cd9f11f975b6d5
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 9c647d5..6efef34 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 9c647d5ae17026e4d0b791553397d4d38acf66db
+Subproject commit 6efef3438c236ed0e522809c0c9acce5f0c81374