function newPersistenceStore(storeType, name) {
       switch(storeType) {
           case 'file': 
               return require('./Stores/FileStore').newNetworkGlobalsStoresFileStore(name)
           case 'mongodb': 
               return require('./Stores/MongoDbStore').newNetworkGlobalsStoresMongoDBStore(name)
           default: throw new Error('The store type ' + storeType + ' is not implemented, why not create it yourself.')
       }
   }
Returns a new implementation of the chosen data store, 
if the storeType does not match any of the current 
implementations then an error is thrown.

@param {string} storeType 
@param {string} name