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* Update docs/submodules/yardstick from branch 'master'
  - Merge "Create user defined "NodePort" services per pod"
  - Create user defined "NodePort" services per pod
    
    This feature will give the user the ability to create user defined "NodePort"
    services per pod, a part from the default SSH port created, by default, for
    each pod created.
    
    Example of Kubernetes yaml definition:
      apiVersion: v1
      kind: Servicemeta
      data:
        name: pod-1-service-nodeport
      spec:
        type: NodePort
        ports:
          - name: web
            port: 80
            targetPort: 8888
            nodePort: 33333
        clusterIP: 10.254.0.8
        selector:
          app: pod-1
    
    Example of Yardstick test case definition:
      context:
        type: Kubernetes
        servers:
          host:
            containers:
              - image: ...
                securityContext:
                  allowPrivilegeEscalation: false
              - image: ...
            node_ports:
              - port: <port number>         # Mandatory
                name: <port name>           # Optional
                targetPort: <port name>     # Optional, default: targetPort=port
                nodePort: <port number>     # Optional, assigned by Kubernetes
    
    Kubernetes service, type "NodePort" [1]
    
    [1] https://kubernetes.io/docs/concepts/services-networking/service/#type-nodeport
    
    JIRA: YARDSTICK-1181
    
    Change-Id: Ia7730e4569d5526d573402a98c27d55c5c82cdef
    Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>
    

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