Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Restrict ping only once in ping.sh"
  - Restrict ping only once in ping.sh

    Otherwise, it makes no sense to configure ping_timeout as
    200 times.

    Change-Id: I6e15f5149f24a4316f6d5b70bcda9a46418d1522
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index cd4716e..7f3ab61 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit cd4716eb5fa3a12e256fba8faa75780b7398ff68
+Subproject commit 7f3ab61c2a072350f55a22bcd6a995ee18a3ba3e