Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Create API to get log for each task"
  - Create API to get log for each task

    API: /api/v1/functest/tasks/<task_id>/log
    METHOD: GET

    JIRA: FUNCTEST-867

    Change-Id: I987cbf662e4da349bf7583e48da5d981a2f1e0fd
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 6e1245a..6726fb1 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 6e1245a7d19d62810fbe5ee1aab248a85fa2bc15
+Subproject commit 6726fb16f9719b21636454c9573f0cc716ea25f4