Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  to fe1a78666f215a568866c4b5eb28c8feda0ad278
  - Bugfix: Fix Dovetail 2 bugs found with CI results

    There are 2 bugs found with CI results of functest.tempest.neutron_tempest_plugin_api
    and all HA test cases.
    Yardtsick conf file does't mapping the keyfile to Yardstick container, so all
    HA test cases got SSHERROR.
    Also remove some useless debug msg to make dovetail.log more concise.

    Change-Id: I63c12d1b91ed5f8f8a893689384685ca9215f367
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index dc5264e..fe1a786 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit dc5264ec9b19a8673204af11dbba68bdb50cfde2
+Subproject commit fe1a78666f215a568866c4b5eb28c8feda0ad278