Update git submodules

* Update docs/submodules/clover from branch 'stable/gambia'
  - Merge "Initial commit of controller services config guide" into stable/gambia
  - Initial commit of controller services config guide

    - Controller services lump cloverctl CLI and clover-controller
    together and this config guide provides brief overview
    and deploy/delete instructions
    - Intended to be one of the first guides a user follows,
    as controller is prerequisite for many other Clover services
    - Add new, existing config guides to index
    including forthcoming jmeter, visibility guides
    - Embedded images forthcoming

    Change-Id: Ifef0248d9370df862a1d192b979606e443a82e95
    Signed-off-by: earrage <eddie.arrage@huawei.com>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index 0c3b584..627bcd6 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit 0c3b5842cdb0889dc618da40ea41016ad95f0180
+Subproject commit 627bcd67358efaffe050e5e426093f2ea7233db0