Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "compass: Build Docker images with jjb"
  - compass: Build Docker images with jjb

    JIRA: COMPASS-567

    Add compass4nfv-docker.yml
    compass-tasks-k8s and compass-tasks-osa are dependent on compass-compass-tasks.
    So we have to phase to build docker images
    phase 1. execute the multijob 'build compass-tasks images'
    Only the phase 1 is successful then excute the phase 2
    phase 2. execute the multijob 'build all compass images'

    Modify the opnfv-docker.sh
    1. Add a function remove_containers_images
    2. call the remove_containers_images when beginning and finishing build
       to solve the problem of rmove of images due to dependancy

    Change-Id: I66fb27260cf114da96417361e80c8183db3233bd
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 9df9096..c22d576 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 9df9096e0d327e709a8fd9b3552db7d6102565de
+Subproject commit c22d5765b18e0bda4b8ecd0a33066b4c2d4551dc