FosElasticaBundle lost compatibility with enqueue-elastica-bundle

[roomm]

Since 6.3.0 version of FOSElasticaBundle because of the deprecation of PostAsyncInsertObjectsEvent the command fos:elastica:populate stop working properly:

• No error messages are shown
• No Progressbar is shown

That's because in enqueue-elastica-bundle, the dispatched event is PostAsyncInsertObjectsEvent