Metrics Policy : update the documentation with all available properties

[apoddany]

<#assign metrics = request.getMetrics() >
<#assign log = metrics.getLog()! >
{
  "requestId" : "${metrics.getRequestId()!}",
  "transactionId":"${metrics.getTransactionId()!}",
  "api":"${metrics.getApi()!}",
  "application":"${metrics.getApplication()!}",
  "plan":"${metrics.getPlan()!}",
  "subscription":"${metrics.getSubscription()!}",
  "endpoint":"${metrics.getEndpoint()!}",
  "host":"${metrics.getHost()!}",
  "uri":"${metrics.getUri()!}",
  "httpMethod":"${metrics.getHttpMethod()!}",
  "path":"${metrics.getPath()!}",
  "mappedPath":"${metrics.getMappedPath()!}",
  "userAgent":"${metrics.getUserAgent()!}",
  "localAddress":"${metrics.getLocalAddress()!}",
  "remoteAddress":"${metrics.getRemoteAddress()!}",
  "requestContentLength":"${metrics.getRequestContentLength()!}",
  "responseContentLength":"${metrics.getResponseContentLength()!}",
  "apiResponseTimeMs":"${metrics.getApiResponseTimeMs()!}",
  "proxyResponseTimeMs":"${metrics.getProxyResponseTimeMs()!}",
  "proxyLatencyMs":"${metrics.getProxyLatencyMs()!}",
  "status":"${metrics.getStatus()!}",
  "message":"${metrics.getMessage()!}",
  "errorKey":"${metrics.getErrorKey()!}",
  "user":"${metrics.getUser()!}",
  "securityType":"${metrics.getSecurityType()!}",
  "securityToken":"${metrics.getSecurityToken()!}",
  "tenant":"${metrics.getTenant()!}",
  "zone":"${metrics.getZone()!}"
  <#if (log.getClientRequest())??>
  ,"client-request": {
  "method":"${log.getClientRequest().getMethod()}",
  "uri":"${log.getClientRequest().getUri()}"
    <#if log.getClientRequest().getBody()??>
    ,"body":"${log.getClientRequest().getBody()?j_string}"
    </#if>
    <#if log.getClientRequest().getHeaders()??>
    ,"headers":{
      <#list log.getClientRequest().getHeaders().names() as header>
      "${header}": [
        <#list log.getClientRequest().getHeaders().getAll(header) as value>
          <#if value??>
            "${value?j_string}"
            <#sep>,</#sep>
          </#if>
        </#list>
      ]
        <#sep>,</#sep>
      </#list>
    }
    </#if>
  }
  ,"client-response": {
  "status":${log.getClientResponse().getStatus()}
    <#if log.getClientResponse().getBody()??>
    ,"body":"${log.getClientResponse().getBody()?j_string}"
    </#if>
    <#if log.getClientResponse().getHeaders()??>
    ,"headers":{
      <#list log.getClientResponse().getHeaders().names() as header>
      "${header}": [
        <#list log.getClientResponse().getHeaders().getAll(header) as value>
          <#if value??>
            "${value?j_string}"
            <#sep>,</#sep>
          </#if>
        </#list>
      ]
        <#sep>,</#sep>
      </#list>
    }
    </#if>
  }
  </#if>
  <#if (log.getProxyRequest())??>
    <#if log.getClientRequest()??>,</#if>
  "proxy-request": {
  "method":"${log.getProxyRequest().getMethod()}",
  "uri":"${log.getProxyRequest().getUri()}"
    <#if log.getProxyRequest().getBody()??>
    ,"body":"${log.getProxyRequest().getBody()?j_string}"
    </#if>
    <#if log.getProxyRequest().getHeaders()??>
    ,"headers":{
      <#list log.getProxyRequest().getHeaders().names() as header>
      "${header}": [
        <#list log.getProxyRequest().getHeaders().getAll(header) as value>
          <#if value??>
          "${value?j_string}"
            <#sep>,</#sep>
          </#if>
        </#list>
      ]
        <#sep>,</#sep>
      </#list>
    }
    </#if>
  }
  </#if>
  <#if (log.getProxyResponse())??>
  ,"proxy-response": {
  "status":${log.getProxyResponse().getStatus()}
    <#if log.getProxyResponse().getBody()??>
    ,"body":"${log.getProxyResponse().getBody()?j_string}"
    </#if>
    <#if log.getProxyResponse().getHeaders()??>
    ,"headers":{
      <#list log.getProxyResponse().getHeaders().names() as header>
      "${header}": [
        <#list log.getProxyResponse().getHeaders().getAll(header) as value>
          <#if value??>
          "${value?j_string}"
            <#sep>,</#sep>
          </#if>
        </#list>
      ]
        <#sep>,</#sep>
      </#list>
    }
    </#if>
  }
  </#if>
}