Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Update Clover tags Clover for Fraser 6.0.1"
  - Update Clover tags Clover for Fraser 6.0.1

    Add the opnfv-6.0.1 to the current commit, and lists opnfv-6.0.0 as
    being tagged on the previous one.

    Change-Id: I01b3efb6fe04b3dcf32ef2c01315ecb34fb30133
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index af96f6c..e7cba63 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit af96f6ccbb358350483c8287f398fb8faf5331b4
+Subproject commit e7cba63ac581a457ae45053d8c497377c1642f8b