Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fix RabbitMQ service installation in Yardstick jobs"
  - Fix RabbitMQ service installation in Yardstick jobs

    RabbitMQ commands need to be executed as root user.

    JIRA: YARDSTICK-1104

    Change-Id: Ia6667cc3f7572f67a38fd4fd4bcf9fbb4309d36c
    Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 945534e..58126f0 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 945534eee8642759408f135ff6b0b5a2e9c7b614
+Subproject commit 58126f06600112dd592a9c8776cca7770580ac8f