Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Remove approve / no approve options for reviewers

    Distinguish results shared or submitted from a tester

    JIRA: DOVETAIL-544
    JIRA: DOVETAIL-545

    [cvp-web]There is consensus within C&C committee to move towards a
    simpler means of voting by reviewers. We will use email voting (+1) on
    the [cvp@opnfv.org|mailto:cvp@opnfv.org] email alias. For now, can we
    disable the approve / not approve options in the drop-down in the
    'Operation' column of the results? We can revisit this feature in the
    future after some experience with the manual method.

    [cvp-web]When a user shares or submits results, the recipient of
    those results (share target or reviewer) do not know where the results
    originated from. To remedy this issue, we will add a column labeled
    'Owner' to the 'My Results' table that shows the email address or the
    sending party?

    Change-Id: I586b01ad113d898fe3d5824025df9877118fa622
    Signed-off-by: grakiss <grakiss.wanglei@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 55bb29b..b3501de 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 55bb29b1d7b977b387a74f754b4baea94274141c
+Subproject commit b3501de5a645f69c705e64345965aab9cd271355