Fix documentation for persistence "identifier" option
Fix documentation for persistence "identifier" option

alekitto/FazlandElasticaBundle,Exercise/FOQElasticaBundle,ramuss/FazlandElasticaBundle,alekitto/FazlandElasticaBundle,peterkokot/FOSElasticaBundle,ramuss/FazlandElasticaBundle,fazland/FazlandElasticaBundle,fazland/FazlandElasticaBundle