Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - NSB update
    
    Refactored main NSB VNF classes accroding to class diagram
    
    https://wiki.opnfv.org/display/yardstick/NSB+class+diagram
    
    All the SampleVNFs have been separated and placed under
    the SampleVNF class.
    
    Added AutoConnectSSH to automatically create SSH conneciton on demand.
    
    Added VnfdHelper class to wrap the VNFD dictionary in prepartion for
    class-based modeling.
    
    Extracted DpdkVnfSetupEnvHelper for DPDK based VNF setup.
    
    Extracted Stats and other client config to ResourceHelper
    
    Had to replace dict_key_flatten with deepgetitem due to Python 2.7
    Jinja2 infinite recursion.
    
    Change-Id: Ia8840e9c44cdbdf39aab6b02e6d2176b31937dc9
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>
    Signed-off-by: Edward MacGillivray <edward.s.macgillivray@intel.com>
    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 72778951d6b8968f562fb8fefa02a57159ea1b8
+Subproject 5ce3b6f8c8b3217091e51a6041455738603d90b