Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Add "tolerations" parameter in Kubernetes context
    
    This new parameter, "torelations", is applied to pods and allow (but not
    require) the pods to schedule onto node with matching tains [1].
    
    Example of "tolerations" definition in a Kubernetes pod:
    
      spec:
        containers: [...]
        tolerations:
          - key: <key defined in the taint>
            value: <key value to match with the taint>
            effect: <effect in case of match>
            operator: <matching operator>
          - key: ...
    
    Example of "tolerations" definition in a Yardstick test case:
    
      context:
        type: Kubernetes
        servers:
          host:
            containers: [...]
            tolerations:
              - key: ...
                value: ...
                effect: ...
                operator: ...
    
    NOTE: if any toleration is defined, a default one will be applied in
    order to allow any replication controller to create the pods in any
    Kubernetes node. This default toleration is defined as:
    
      spec:
        tolerations:
          - operator: "Exists"
    
    [1] https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
    
    JIRA: YARDSTICK-1254
    
    Change-Id: I32fb9c7086b4218c323218738057f634eb6ffff4
    Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>
    

1 files changed, 0 insertions, 0 deletions

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
-Subproject ff3cd7a245840606b09322c7705f8a64cf1868f
+Subproject 42b33dc3cba15a22214295770756c94f9be08f1