Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Remove rally and tempest from core/Dockerfile"
  - Remove rally and tempest from core/Dockerfile

    JIRA: FUNCTEST-889

    Change-Id: I6092c8b6599705d23dcb3aba8c4470b76c41455c
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 9831193..c729039 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 98311932d448f21a872ac0cd5f46258ecddd89e0
+Subproject commit c7290395d161c8c5fb4a4bf13d543e2a562b3ba1