Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "add more information for the Identity testcases in the refstack"
  - add more information for the Identity testcases in the refstack

    JIRA: DOVETAIL-431

    in order to show more details of the test cases,
    all below information are added:
    the Use case specification, Test preconditions, Basic test flow execution description,
     pass/fail criteria, and Post conditions

    Change-Id: Id1886be6a868813f2cff6cacf42329494e94308c
    Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 26e9f22..7e0f6ff 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 26e9f2236ae2bcc8e14e5d4c32b883df188f1356
+Subproject commit 7e0f6ff7f01b2606e854931d1dd5ed1d12a7547f