blueprintLookupPaths() {
    if (this.isEmberCLIProject()) {
      let lookupPaths = [this.localBlueprintLookupPath()];
      let addonLookupPaths = this.addonBlueprintLookupPaths();

      return lookupPaths.concat(addonLookupPaths);
    } else {
      return this.addonBlueprintLookupPaths();
    }
  }
Returns a list of paths (including addon paths) where blueprints will be looked up.

    @private
    @method blueprintLookupPaths
    @return {Array} List of paths