title: Integer Type conversion in yaml
body: <p>The below is my <code>istio yaml</code> for traffic shifting. I am getting the below error if I pass parameter in spinnaker. I am sending only integer values like 10, 20 etc.</p>
  
  <p>"json: cannot unmarshal string into Go value of type int32"</p>
  
  <p>Can I change the string to integer in yaml ?</p>
  
  <pre><code>- apiVersion: networking.istio.io/v1alpha3
    kind: VirtualService
    metadata:
      name: webvs
      namespace: default
    spec:
      gateways:
        - xyz.default.svc.cluster.local
        - mesh
      hosts:
        - web.xyz.com
      http:
        - route:
            - destination:
                host: web.default.svc.cluster.local
                port:
                  number: 8080
                subset: v1
              weight: '${ parameters.Prodweightb }'
            - destination:
                host: web.default.svc.cluster.local
                port:
                  number: 8080
                subset: v2
              weight: '${ parameters.Blineweightb }'
            - destination:
                host: web.default.svc.cluster.local
                port:
                  number: 8080
                subset: v3
              weight: '${ parameters.Canaryweightb }'
  </code></pre>