Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "delete 'opnfv-build-ubuntu-defaults' parameters for doctor verify job"
  - delete 'opnfv-build-ubuntu-defaults' parameters for doctor verify job

    Currently it will pass all the 'opnfv-build-ubuntu-defaults' parameters
    to the child jobs which include the node 'label', so all the doctor jobs
    will be running in the nodes with 'opnfv-build-ubuntu' label.

    Change-Id: If01f1f777c30c421f063c05fdd3c939f8758226c
    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>