Update git submodules

* Update docs/submodules/yardstick from branch 'stable/danube'
  - Merge "improve git code with devstack functions" into stable/danube
  - improve git code with devstack functions
    
    if we aren't re-cloning we still need to make sure
    we update the branch/tag/commit to the version from the remote
    
    so we need to fetch and then checkout again
    
    it is more complicated.  Dockerfile does a shallow
    clone, so we don't get all the remote ref information.
    
    To clone a random remote commit id we have to unshallow
    
    Change-Id: If15f504b6ff2cfdfc8894fd3b37e687a19616714
    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 d583b110cf0952b2a61a74e35ac7c42ad7a0a33
+Subproject 9e0b2465e53fda587c003e8d646308d0a2b62cb