Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Do not use cache when building the image

    Conflicts:
        build.sh

    Change-Id: I4655b631313c923b40304740c0abe06ae885727e
    Signed-off-by: Linda Wang <wangwulin@huawei.com>
    (cherry picked from commit 61083f97ca4552ffa4fa83b20d30f4a914e24eee)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 1b5b20b..d45f54a 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 1b5b20be96f9ed46e23f3b7feb3ee63f8731345b
+Subproject commit d45f54a5ea6a2279f42dd4334035a1f9cdfba75e