Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Merge "Added dependent python packages to Clover container"
  - Added dependent python packages to Clover container

    - Added pip grpcio and argparse packages to docker build
    - Allows service (nginx/snort) client sample scripts to be
    executed using the Clover container without having to clone
    the repo

    Change-Id: Ifeda6d58a9a381cb80372255f41ad703a089ea4b
    Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index 658c99a..a1d8f68 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit 658c99a18bd138bc0d21cbf1216db99953d07b1f
+Subproject commit a1d8f683f31fa8277dd21749c05eec527f31d93e