Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - delete the 'node' parameter in 'doctor-slave-parameter' macro

    We define the 'node' parameter in job template:
    'doctor-verify-{installer}-{inspector}-{arch}-{stream}',
    so we don't need to redefine them in the doctor parameter macro.
    It will schedule the fuel verify job to the default apex env.
    See: https://build.opnfv.org/ci/job/doctor-verify-fuel-sample-x86_64-master/1/console

    Change-Id: I49e6d26ca284f6548460312de0cb634bd033d3c1
    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>