Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: Remove snapshot workarounds

    There's no need to install java or do the docker workaround anymore
    after fixes into Apex:
    https://gerrit.opnfv.org/gerrit/#/c/60053/

    Change-Id: I3d7d5fcc066bfb4416fcd3404c89e6e814dbf31e
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index c113728..d3b659a 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit c1137281ace0fc072df1f7d22c982737015b8913
+Subproject commit d3b659a9df9f19dc24242fdd3a232d38de6eb4e4