Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Run Doctor apex sample with all test cases"
  - Run Doctor apex sample with all test cases

    Running Apex sample with both fault_management and maintenance.
    If cannot support maintenance, it will be skipped.
    Apex Congress fault_management will be tested after this test.

    Change-Id: I31562debae5a3f4de6b943a41bff2d89923ea3f0
    Signed-off-by: Tomi Juvonen <tomi.juvonen@nokia.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 75c2b33..d499499 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 75c2b330421016b18e67c40f408be3f0c3721986
+Subproject commit d499499b994e67b8361754b4fa63be43c6a2b6b9