Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  to 47559a6afe2c66ff536c45f61be730991042b68d
  - Fix the verdict of sub test cases

    Error to group skipped sub test cases to passed one.
    Example:
    Skipped sub test case will be parsed as passed in following case.

    skipped sub test case:
    tempest.api.network.test_routers.RoutersTest.test_create_show_list_update_delete_router

    passed sub test case list includes this one:
    tempest.api.network.test_routers.RoutersTest.test_add_remove_router_interface_with_subnet_id

    Then the skipped one will be checked as pass.

    JIRA: DOVETAIL-775

    Change-Id: I449f4968c23a9def1177a7c9645e5dcb89b2ec30
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 418cce6..47559a6 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 418cce60e12698b0a4d1c4518070cf290a9f6581
+Subproject commit 47559a6afe2c66ff536c45f61be730991042b68d