Update git submodules

* Update docs/submodules/dovetail from branch 'stable/fraser'
  - [bugfix] stress test case calls Yardstick ovp-2.0.0 with Dovetail stable/fraser

    Currently, stress test case calls Yardstick stable image to run the ping tests.
    Yardstick stable isn't a fix version. Change it to be ovp-2.0.0.

    Change-Id: I0b26fcf8e90b114b813892a8804a1e11f3aaa8ec
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 083efad..05ffb18 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 083efad304a64217426b827a666ae828e7b4d0e7
+Subproject commit 05ffb18a9d045fe94e93e9fdae376939f5d12d0b