Update git submodules

* Update docs/submodules/releng from branch 'master'
  - run doctor tests with different inspectors in sequence

    As doctor tests have different inspectors, if they run in parallel
    of one multijob, they will operator one cloud to create/delete
    some resources, such as project, user, network and so on. It will
    cause some conflicts.

    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>
    Change-Id: I8111b28ad9de409542606f7be39a1ee0d838f8b6

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f1798a4..adfbaf2 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f1798a4fa7145e37184bad8d282b49a922df21b4
+Subproject commit adfbaf2a3e8487e4c9152bf864a653a0425b8582