Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Simplify project conf files

    1. use copy commands instead of pre_copy
    2. remove redundant items in project conf files
    3. make the volume mapping clearer

    Change-Id: I6c6aa58fac65d7e40105e0a54f6544ee5c47db31
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 8ab783f..78b0062 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 8ab783f403984b3ef9a6c3010a9a81c0f29c4236
+Subproject commit 78b0062ce9dc4d23b967112a0896f12cc6526e1c