Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "remove releng from Dockerfile and elsewhere"
  - remove releng from Dockerfile and elsewhere

    Current CI does openrc fetching before starting
    the Docker container and then passes openrc
    via Docker mount

    JIRA: YARDSTICK-691

    Change-Id: Id0649130f48db5a5586149b237c5252b953e57be
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 2736a90..f28354a 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 2736a90663e8d29cc968a5dac16b7606f9554001
+Subproject commit f28354a8d0c7e3aa190d8c71391d03be4608c70d