Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "Test case specification for VIM Volume"
  - Test case specification for VIM Volume

    1. Add the alias VIM Volume test cases into testscope.
    2. Add test case specification for VIM Volume.

    Change-Id: I715a69aad380466659365cc554351efb4d6eb053
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 6d3d7ae..eb11ceb 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 6d3d7ae7fad884a37e01c275511fa15e97dcd665
+Subproject commit eb11ceb0320da4f50dd42a897fcd77dc2b90a423