Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Remove timestamp in the details for tempest"
  - Remove timestamp in the details for tempest

    Example:
    "success":
    ["2017-08-15 06:59:30.445 1180 INFO opnfv-tempest [-] {0} tempest.sce
    nario.test_server_basic_ops.TestServerBasicOps.test_server_basic_ops"]
    which is updated to:
    "success":
    ["tempest.scenario.test_server_basic_ops.TestServerBasicOps.test_serv
    er_basic_ops"]

    Change-Id: Iad13e380b3a1fdc37b7742929512098bccc6d460
    Signed-off-by: Linda Wang <wangwulin@huawei.com>