added test to prove mongoosastic works with existing indexes
added test to prove mongoosastic works with existing indexes

hdngr/mongoosastic,mongoosastic/mongoosastic,teambition/mongoosastic,mallzee/mongoosastic,guumaster/mongoosastic,hdngr/mongoosastic,ennosol/mongoosastic,teambition/mongoosastic,francesconero/mongoosastic,hdngr/mongoosastic,guumaster/mongoosastic,mallzee/mongoosastic,avastms/mongoosastic,mallzee/mongoosastic,avastms/mongoosastic,ennosol/mongoosastic,francesconero/mongoosastic,mongoosastic/mongoosastic,mongoosastic/mongoosastic,guumaster/mongoosastic