Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Add schema valiadator to jinja checker

    Alex has extended the jinja checker to valiate the schema
    uses jsonschema

    Next step is to enable voting on this job.

    Change-Id: I3c61eb3addbb3d41093ada486bf9d8b191fb2028
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4b1560c..fcf7d31 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4b1560c6499e53efb3b2ca83294265052396b2d5
+Subproject commit fcf7d31301c5535b82ebe02b7bd1a6fb68468256