Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Develop snort IDS and content inspect service

    - Initial commit to show potential structure of a sample service
    - This wil be part of a larger sample application currently dubbed
    Service Delivery Controller
    - Docker container needs to be built and employs open-source Linux packages
    - Service is deployable in Istio service mesh using provided yaml
    - Control snort daemon and add custom rules with GRPC messaging
    - Process snort alerts actively and send to redis and upstream service
    mesh components
    - Integrates a web server for better HTTP signature detection

    - Improved build script for CI with variables
    - Render k8s yaml snort manifest dynamically with command
    line options
    - Improve snort_client sample script for runtime modifications
    including passing args on CLI, error checking
    - Update nginx proxy interface
    - Added logging to snort server and alert process

    Change-Id: Ic56f9fcd9ed21f64b84b85ac8ee280d69af7b7c9
    Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index c43c773..56f50ac 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit c43c773fc33167f46461b4fd1ae58e40d390d59e
+Subproject commit 56f50acd66d6f041b0347babb131150db3ca2023