added read only setting to the manager's constructor
added read only setting to the manager's constructor

murnieza/ElasticsearchBundle,ongr-io/ElasticsearchBundle,trandangtri/ElasticsearchBundle,murnieza/ElasticsearchBundle,martiis/ElasticsearchBundle,asev/ElasticsearchBundle,ndinh215/ONGRElasticsearchBundle,martiis/ElasticsearchBundle,asev/ElasticsearchBundle,tautrimas/ElasticsearchBundle,saimaz/ElasticsearchBundle,ndinh215/ONGRElasticsearchBundle,trandangtri/ElasticsearchBundle,saimaz/ElasticsearchBundle,tautrimas/ElasticsearchBundle