Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix some errors about getting tiers resources"
  - Fix some errors about getting tiers resources

    Change-Id: I95cf1cb453e30875498d4dfbbe15f19452c48df1
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 64769b2..6c5c759 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 64769b2b8bfbad70eba4708a4d6e01b96fa035c6
+Subproject commit 6c5c75973588e757f9bd4ee8f88fabfd1dc29b02