Update git submodules

* Update docs/submodules/yardstick from branch 'stable/fraser'
  - nsb_setup: pin docker image version to release tag
    
    The install scripts pull tags for stable releases.
    
    We need to temporarily pin the image tag to the unreleased tag
    because we have to update the code before we actually tag the image.
    
    Or maybe we should make this a parameter to the script
    
    JIRA: YARDSTICK-1137
    
    Change-Id: I2e5f13ffe19d1c19fd7b8e071df28fd225be3d79
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
    

1 files changed, 0 insertions, 0 deletions

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
-Subproject 26083c4931c0bc72569d782c9df569dc6369077
+Subproject 5a18f5420f9077557d9f50ebe420b66813ebee4