Update git submodules

Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Merge "Implement initial clover-controller service"
  - Implement initial clover-controller service

    - First pass of clover-controller which resides within the k8s
    cluster and provides interfaces to all Clover services
    - Only service that should need to be exposed outside of
    cluster
    - Docker build of container that uses stack of nginx, gunicorn
    and flask to provide REST interface
    - REST interface is intended to serve cloverctl CLI and
    dashboard browser UI
    - Implements GRPC messaging to clover-collector and snort
    - GRPC interfaces files for snort/nginx are added to
    container from repo. Collector GRPC files will be removed
    from controller/control/api once patch below is merged
    https://gerrit.opnfv.org/gerrit/#/c/57245/ and added
    similarly
    - Provides first pass callback for file upload from
    clover-server.
    - Some REST messages implement JSON for passing params
    to internal services
    - Redis interface added to obtain data from services.
    Currently, a simple interface to retrieve snort event
    information
    - YAML manifest renderer to add to k8s. Uses NodePort
    service currently, defaulting to port 32044.

    - Removed collector gRPC interface files with merge of collector
    - Expose tracing and monitoring host/port parameters, as these vary
    depending on Istio version and Jaeger version
    - Add logging to flask blueprints
    - Added jmeter blueprint interface with REST for
    testplan generation, start test and result retrieval
    - Added flask Response to REST reply messages
    - Retrieve some basic stats from collector in json
    response

    Change-Id: I59eaeb860445ade4b45bba22747a61fb0cf0bbd4
    Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>