Fix #64
Fix #64

This fix addresses cases where esTruncate was invoked without calling a save or remove before it. This caused indexName to be missing when needed by esClient.deleteByQuery.

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