Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "dovetail tool: bugfix: test cases are erroneously judged"
  - dovetail tool: bugfix: test cases are erroneously judged

    JIRA: DOVETAIL-375
    JIRA: DOVETAIL-390

    1. defcore test cases are erroneously judged because of:
       a) defcore results json data lack some keys
       b) some sub-testcases' names are the same as the prefix of another sub-testcases.
    2. this patch removes the extra keys and judge sub-testcases accurately.
    3. remove "store_type" in functest_config.yml and yardstick_config.yml.
    4. change some log levels from info to debug.

    Change-Id: I5f126e70309409cac66ef9a0909f1573d325098b
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 52503b8..9202812 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 52503b8bca1025a3412385b45591999530cedc40
+Subproject commit 920281280fd055e796d8eec8b47416ec9a2d457f