Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - [cvp-web] Bugfix: Total num of test cases should be fixed

    JIRA: DOVETAIL-552

    The total num of test cases is decided by the number of the test cases
    users uploaded to the Web now.
    The total num should be fixed. For example, the total num of mandatory
    test cases should be 215. The total num of optional test cases should be
    63.

    Change-Id: I6f7055bbeceb80f831af7d800b1a5aca4e165c45
    Signed-off-by: grakiss <grakiss.wanglei@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index ffe419b..25e6fc8 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit ffe419bf63938be76af7e57ee782ae928a7391f7
+Subproject commit 25e6fc8a5bc2cae8a062076ca460348835846d0a