Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  to bd349865f6f7b988d0b17d4f115eb024078cd6b1
  - Merge "Replaces lf-build1/2 references with lf-build5/6"
  - Replaces lf-build1/2 references with lf-build5/6

    Updating parameters to use labels where applicable.
    Also disables the 'ansible-build-server' job until it can be verified to
    work on the new build servers without causing issues.

    Change-Id: I130d18c54a66c2cd504ed950a61c7249c3beefa8
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>