message: Reuse IModelDb if the briefcase is reused.
diff: @@ -69,6 +69,8 @@ export class IModelDb extends IModel {
  }
  private static create(briefcaseEntry: BriefcaseEntry, contextId?: string): IModelDb {
  + if (briefcaseEntry.iModelDb)
  + return briefcaseEntry.iModelDb; // If there's an imodeldb already associated with the briefcase, that should be reused.
  const iModelToken = IModelToken.create(briefcaseEntry.iModelId, briefcaseEntry.changeSetId, briefcaseEntry.openMode, briefcaseEntry.userId, contextId);
  const props = JSON.parse(briefcaseEntry.nativeDb.getIModelProps()) as IModelProps;
  const name = props.rootSubject ? props.rootSubject.name : path.basename(briefcaseEntry.pathname);
  