title: karate webSockets : getting invalid handshake response getStatus: 403 Forbidden
body: <p>While writing karate feature test for websockets i am getting Invalid handshake response while the same endpoint is working when executed with postman.Here is karate feature test</p>
  <pre><code>Background:
  * def accessTokenKey = call read('PostmanRequest.feature')
  * def AuthToken = accessTokenKey.response.access_token
   
  Scenario: getAccounts using txt
  * def socket = karate.webSocket('wss://api-ws-priv.eem.sit.bank.ikano/csp-v1 
    action=searchCounterParty&amp;authtoken=' + AuthToken)
  * def requestdata = read('classpath:testData/getAccountsRequest.txt')
  * socket.send(requestdata)
  * def result = socket.listen(5000)
  * json jsonResult = result
  * print jsonResult.event.payload.operation
  * match jsonResult.event.payload.operation.operationCode == '200'
  </code></pre>
  <p>The error response we are getting is this:</p>
  <pre><code>14:26:39.336 websocket client init failed: Invalid handshake response getStatus: 403 Forbidden
  14:26:39.361 src/test/java/Features/getAccounts.feature:16
  * def socket = karate.webSocket('wss://api-ws-priv.eem.sit.bank.ikano/csp-v1? 
  action=searchCounterParty&amp;authtoken=' + AuthToken)
  js failed:
  01: karate.webSocket('wss://api-ws-priv.eem.sit.bank.ikano/csp-v1? 
  action=searchCounterParty&amp;authtoken=' + AuthToken)
  org.graalvm.polyglot.PolyglotException: 
  io.netty.handler.codec.http.websocketx.WebSocketClientHandshakeException: Invalid handshake 
  response getStatus: 403 Forbidden
  - com.intuit.karate.http.WebSocketClient.&lt;init&gt;(WebSocketClient.java:148)
  - com.intuit.karate.core.ScenarioEngine.webSocket(ScenarioEngine.java:750)
  - com.intuit.karate.core.ScenarioBridge.webSocket(ScenarioBridge.java:988)
  - com.intuit.karate.core.ScenarioBridge.webSocket(ScenarioBridge.java:970)
  - &lt;js&gt;.:program(Unnamed:1)
  </code></pre>
  <p>Is this something karate is not able to connect to server due to which we are getting this exception as this is working fine with postman.</p>