title: How to delete resources by label with Kubeclient?
body: <p>I am trying to delete multiple ConfigMaps at once using a label. With <code>kubectl</code>, I would do it as follow:</p>
  <pre class="lang-sh prettyprint-override"><code>kubectl delete cm -l application=my-app
  </code></pre>
  <p>Kubeclient offers the <code>delete_config_map</code> method, but it requires a name.</p>
  <pre class="lang-rb prettyprint-override"><code># `k` is an instance of Kubeclient::Client
  k.delete_config_map('my-config-map')
  </code></pre>
  <hr />
  <p><strong>Is there a way to acheive the same behavior as the CLI here?</strong></p>