Update git submodules
* Update docs/submodules/yardstick from branch 'stable/gambia'
- Merge "Trex KPI are not collected due to rabbitmq user" into stable/gambia
- Trex KPI are not collected due to rabbitmq user
Changed the way rabbitmq-server user is created. Fix is needed to
collect KPIs from Trex.
JIRA: YARDSTICK-1479
Change-Id: I54369535fdb7af6af76de30f758227736f83db78
Signed-off-by: Stepan Andrushko <stepanx.andrushko@intel.com>
(cherry picked from commit
d06e6da19db545dfcc6fdfdc706b9cccdb75c498)