Update git submodules

* Update docs/submodules/releng from branch 'master'
  - bug-fix: k8s capacity test name

    JIRA: BOTTLENECK-242

    TEST_CASE is wrongly defined. Spaces should be deleted
    in order to make the right defination for shell.

    Change-Id: I981e80af8fc8dfd9f375b44b205f7478e0d4f260
    Signed-off-by: Yang (Gabriel) Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 22e9d29..3c5b9ef 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 22e9d2944558888d1a466425290052af47588fe9
+Subproject commit 3c5b9ef236e879684796667d5b4c3de9bdef3f14