Update git submodules

Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Fix controller IP parsing in "nsb_setup.sh" script"
  - Fix controller IP parsing in "nsb_setup.sh" script

    Fixed the controller IP parsing in "nsb_setup.sh" script. The new
    regex expression now accepts "OS_AUTH_URL" as:
      * http://10.237.223.168/identity
      * http://10.237.223.168:5000/identity
      * http://hostname/identity
      * http://hostname:5000/identity

    JIRA: YARDSTICK-829

    Change-Id: Ifaeab991bcbb6aa7b22c3533ab7554527184878b
    Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>