Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Bugfix: Failed to build local DB on Centos

    1. The scripts for building local DB and testapi service just work on Ubuntu.
    2. For Centos, they fails to do that.
    3. This is mainly because of that Centos can't use the IP of the JumpHost
       to connect the DB and testapi. It needs to use the internal IPs of the
       DB container and the testapi container.
    4. Change the IPs in the scripts to be the containers' internal IPs.

    JIRA: DOVETAIL-548

    Change-Id: I71aed82cb620b58bcd43ace61497db65c5bd7ecc
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 0df52c2..2866e0b 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 0df52c2b1fe801b0f282c4f44aed7891a389d833
+Subproject commit 2866e0b3a9f028eee262b65db1e377b50b3f9594