Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Select the subset of snaps test cases"
  - Select the subset of snaps test cases

    Change-Id: I03e422d5dae0ced9cd7a5477c31359ffc7795c42
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 0705a7e..67557f7 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 0705a7ed15f090b3be64f2995d1c9fff51edc2f1
+Subproject commit 67557f7cbd0e96b1654d9925bc163cb46c25d0c9