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>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8bc82a7..0705f31 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8bc82a7f6b26fffa111985dca4aef4273f6a5408
+Subproject commit 0705f31ab5bc54c073df120cbe0fe62cf10f9a81