nuxeo-selectivity.data must map consistently to selectivity.[data or items]

<template>
  <nuxeo-selectivity id='pkgsSelector' data='[{"id":"id1", "text":"text1"}]'>
</template>

<template>
<nuxeo-selectivity id='pkgsSelector' data='[[testRonan]]'>

attached: function() {
  Polymer.RenderStatus.beforeNextRender(this, function() { 
    this.testRonan = [{id: "toto", text: "tototext", displayLabel: "totodisplaylabel"}];
  });
},

 _dataChanged: function() {
  this._selectivity && this._selectivity.setOptions({items: this._wrap(this.data)});
},

if (this.data) {
  options.data = this.data;
} else {
...<snip>...
this._selectivity = new InputType(options);