Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  to 6d33ad294d6bc56226c86604cded0b70a6952661
  - Add portal_key_file into all test case yml files

    Change-Id: If111a8cc56c31ec3e22b090aca92ff56d41f7e01
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index d15825b..6d33ad2 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit d15825b04fde0b40df1840ae2ec2fab2ac961471
+Subproject commit 6d33ad294d6bc56226c86604cded0b70a6952661