Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Merge "Created config guide for SDC sample app"
  - Created config guide for SDC sample app

    - Overview with micro-service diagram
    - Source diagram file in GIMP with layers for editing by
    others
    - Deploying the sample
    - Using the sample
    - Exposing Jaeger Tracing and Prometheus monitoring browser
    interfaces
    - Modifying run-time micro-service configuration including
    modifying load balancer server list and adding a custom snort rule
    - Uninstalling the sample

    - Updated overview with service description, table and traffic
    flow description, general edits
    - Link to A/B configuration guide and doc index file
    - Additional edits
    - Diagram for Jaeger UI with SDC

    Change-Id: I5d851316c05a9e1bd48c8aab5511a98116e6893d
    Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index a52bd21..ef270f1 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit a52bd21da0ee6206ddd61347bc9052d78155a916
+Subproject commit ef270f1c391f5a1ef8b79291b725c8e09f5b17d1