Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "[cvp-web]correct dockerfile"
  - [cvp-web]correct dockerfile

    JIRA: DOVETAIL-515

    correct dockerfile, git clone from dovetail

    Change-Id: I1dee7f8ae5278f55bcf5928bbf88cdb079388494
    Signed-off-by: grakiss <grakiss.wanglei@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 35a3158..6253966 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 35a3158bcbe5a60928101d5c125e4540452e3876
+Subproject commit 6253966250881c8928db93ec19223b1f136c840a