Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Disable get DB schema in Dockerfile

    Dovetail provides files for init local DB.
    No need to get schema from opnfv DB when building docker image.

    Change-Id: I05fbf4f65f3a94bb3a36fe3c140ad7bff58a4f15
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 6253966..38335e5 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 6253966250881c8928db93ec19223b1f136c840a
+Subproject commit 38335e532b032d3257a545bbe547df6b133d1c16