Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Add support for Bottlenecks' new framework and potential installers"
  - Add support for Bottlenecks' new framework and potential installers

    JIRA: BOTTLENECK-103

    Bottlencks does not use docker-compose and support sourcing rc files
    from different installers. This patch is to modify the CI process
    for Bottlenecks.

    Change-Id: I79dc79c6a9528678bf62caa1fa817273e040288c
    Signed-off-by: yuyang <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b52e3a6..704c551 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b52e3a6bb3dc2a667236a5c79492f6dfe623ef07
+Subproject commit 704c55142e663599264aec1a1fbd7b19d55885a3