Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Ansible for build server"
  - Ansible for build server

    Tests are working, switch to running on
    lf-build1 and lf-build2 when triggered.

    Change-Id: I1d3be9a84452cc3d6cd7097474bcc4dca0f70c6d
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e956771..d6d0ef8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e95677122313a92daaaf06af2e2664d1b2035ba4
+Subproject commit d6d0ef824e542fbd70d43bd77186a8b14a456568