Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "dovetail tool: support centos 7"
  - dovetail tool: support centos 7

    JIRA: DOVETAIL-383

    The script launch_db.sh can just support ubuntu now.
    Make it support centos 7.

    Change-Id: Ic6123ac82cb81bacb2d0c2d394619b8d8d7b3296
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index d2a04a7..7142d98 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit d2a04a76f9f03ca4c34cfed335c14d7c3319c634
+Subproject commit 7142d98c73a477e077f1148117316ef12273f412