Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Remove euphrates from domino"
  - Remove euphrates from domino

    Domino is not in the fraser release.

    This is part of a cleanup to remove euphrates jobs

    Change-Id: Ica789accd0148cf847c3498d151bd8ae0b59e8bd
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a753058..f445cb5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a7530584a166fc1b2129a88d3ab52710f6945c63
+Subproject commit f445cb5b0d6d31402bb9b986ec20ea888a3a6fc6