Update git submodules

* Update docs/submodules/compass4nfv from branch 'master'
  - Switch compass-tasks containers to opnfv repo

    Docker images on opnfv repo should be ready
    now and using images from opnfv instead of
    private docker hub

    Change-Id: I2f57c9493c2b8ccdd7b7e5b304176c82661643b3
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index b8fe5ee..8d2dd5e 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit b8fe5eef450224a1346faff33c796d260e64fe36
+Subproject commit 8d2dd5e06e5f1a3983b93cc39022c3e622268ee1