New error modal detection

[mfalesni]

Noticed a new error modal in upstreams, we need to add this into the badness detector.

<div class="modal-content error-modal-miq">
        <div class="modal-header">
          <button class="close" ng-click="$ctrl.close()">
            <span class="pficon pficon-close">
            </span>
          </button>
          <h4 class="modal-title">
            Server Error
          </h4>
        </div>
        <div class="modal-body">
          <div class="col-xs-12 col-md-2">
            <i class="error-icon pficon-error-circle-o"></i>
          </div>
          <div class="col-xs-12 col-md-10">
            <p class="ng-binding">
              <strong>
                Status
              </strong>
              500 Internal Server Error
            </p>
            <p class="ng-binding">
              <strong>
                Content-Type
              </strong>
              text/html; charset=utf-8
            </p>
            <p class="ng-binding">
              <strong>
                Data
              </strong>
              no implicit conversion of nil into String [vm_infra/explorer]
            </p>
          </div>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-primary" ng-click="$ctrl.close()">Close</button>
        </div>
      </div>