Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Only trigger docs-verify-rtd-master for opnfvdocs

    also remove hacky logic that deletes opnfvdocs clone and then
    clones project

    Change-Id: I4c0687af6d31b6759e0f6ccf275d968b9d71a7d9
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 9e42ba2..0da5bdc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 9e42ba29898647aa31b6687a5ca0bac5b2707510
+Subproject commit 0da5bdc42a5f8c1b9dfaeba10a8b45fde9b05216