title: Error pushing flow to REST ODL API with Postman
body: <p>I am trying to push this flow to the REST API of the Nytrogen distribution of ODL with this URL:</p>
  
  <blockquote>
    <p><a href="http://192.168.21.144:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/100/instructions/instruction/3" rel="nofollow noreferrer">http://192.168.21.144:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/100/instructions/instruction/3</a></p>
  </blockquote>
  
  <p>..and this body:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="no"?&gt;
  &lt;flow xmlns="urn:opendaylight:flow:inventory"&gt;
  &lt;flow-name&gt;push-mpls-action&lt;/flow-name&gt;
  &lt;instructions&gt;
      &lt;instruction&gt;
          &lt;order&gt;3&lt;/order&gt;
          &lt;apply-actions&gt;
              &lt;action&gt;
                  &lt;push-mpls-action&gt;
                      &lt;ethernet-type&gt;34887&lt;/ethernet-type&gt;
                  &lt;/push-mpls-action&gt;
                  &lt;order&gt;0&lt;/order&gt;
              &lt;/action&gt;
              &lt;action&gt;
                  &lt;set-field&gt;
                      &lt;protocol-match-fields&gt;
                          &lt;mpls-label&gt;27&lt;/mpls-label&gt;
                      &lt;/protocol-match-fields&gt;
                  &lt;/set-field&gt;
                  &lt;order&gt;1&lt;/order&gt;
              &lt;/action&gt;
              &lt;action&gt;
                  &lt;output-action&gt;
                      &lt;output-node-connector&gt;2&lt;/output-node-connector&gt;
                  &lt;/output-action&gt;
                  &lt;order&gt;2&lt;/order&gt;
              &lt;/action&gt;
          &lt;/apply-actions&gt;
      &lt;/instruction&gt;
  &lt;/instructions&gt;
  &lt;strict&gt;false&lt;/strict&gt;
  &lt;id&gt;100&lt;/id&gt;
  &lt;match&gt;
      &lt;ethernet-match&gt;
          &lt;ethernet-type&gt;
              &lt;type&gt;2048&lt;/type&gt;
          &lt;/ethernet-type&gt;
      &lt;/ethernet-match&gt;
      &lt;in-port&gt;1&lt;/in-port&gt;
      &lt;ipv4-destination&gt;10.0.0.1/32&lt;/ipv4-destination&gt;
  &lt;/match&gt;
  &lt;idle-timeout&gt;0&lt;/idle-timeout&gt;
  &lt;cookie_mask&gt;255&lt;/cookie_mask&gt;
  &lt;cookie&gt;401&lt;/cookie&gt;
  &lt;priority&gt;8&lt;/priority&gt;
  &lt;hard-timeout&gt;0&lt;/hard-timeout&gt;
  &lt;installHw&gt;false&lt;/installHw&gt;
  &lt;table_id&gt;0&lt;/table_id&gt;
  &lt;/flow&gt;
  </code></pre>
  
  <p>And the REST API give to me this:</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
      &lt;meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/&gt;
      &lt;title&gt;Error 415 Unsupported Media Type&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
      &lt;h2&gt;HTTP ERROR 415&lt;/h2&gt;
      &lt;p&gt;Problem accessing /restconf/config/opendaylight-inventory:nodes/node/openflow:1. Reason:
  
          &lt;pre&gt;    Unsupported Media Type&lt;/pre&gt;
      &lt;/p&gt;
      &lt;hr&gt;
      &lt;i&gt;
          &lt;small&gt;Powered by Jetty://&lt;/small&gt;
      &lt;/i&gt;
      &lt;hr/&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>The xml was from opendaylight examples so I think that I am doing something wrong writting the URL.</p>