Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Adapt Bottlenecks Euphrates framework

    Bottlenecks stress test needs some adaptions about Bottlenecks
    Euphrates release.

    JIRA: DOVETAIL-587

    Change-Id: Ia447143c8f08924ac1b190ee0173f39e462c5dfa
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index d41d22b..53dacb0 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit d41d22b691f112a0bae809c63296a10ca58c0a41
+Subproject commit 53dacb0fc00d84b25d22352fd7207e7677dddc35