Update git submodules

Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Add existing public redis pod/service

    - Use a community yaml for redis in k8s as simple data store
    - Redis can be used for tracing and also by the snort-ids
    to store alerts that can be processed by other services
    - If flannel is used, the redis CLI can be accessed on the
    host OS with redis-cli -h <flannel ip>
    - Within the k8s cluster, the redis service can be accessed with
    DNS using name 'redis'
    - The same yaml for redis is also included in toplevel manifest for SDC
    scenario. Included here if intention is to use separately (tracing
    only)

    Change-Id: Ibad283a4cc8938fe01f5de6b7743bdb5511be3af
    Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>