Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix yamllint errors in functest/api"
  - Fix yamllint errors in functest/api

    JIRA: FUNCTEST-897

    Change-Id: I49c7c87dfded000197fe6451fb96dc0749f2ceb0
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 8043d38..3306da5 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 8043d389978b97a39f82c621381a0dff0b1425cd
+Subproject commit 3306da5522f2576f2cd8431aac7fd4f3f4b32ca3