Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - tag dovetail with 0.2.0

    JIRA: DOVETAIL-447

    docker images used

    yardstick danube.3.0
    functest cvp.0.2.0
    testapi cvp.0.2.0
    dovetail cvp.0.2.0

    main changes

    1, fix yardstick HA bugs
    2, fix functest sdnvpn offlinebugs
    3, fix dovetail https bugs, etc.
    for more info, refer to
    https://wiki.opnfv.org/display/dovetail/Running+history+for+the+dovetail+tool

    Change-Id: I4edb61b84ed80d8d7624f69db372fec60d73aa38
    Signed-off-by: MatthewLi <matthew.lijun@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index a6112b4..cc034a7 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit a6112b4fdd288fee0e04f7821b94dcc533737b58
+Subproject commit cc034a7135cf70f137915f8b55c8ef00ab61e96e