grpc-js-xds: Enable outlier detection by default

Author: murgatroid99

packages/grpc-js-xds/src/environment.ts

@@ -16,4 +16,4 @@
  */
 
 export const EXPERIMENTAL_FAULT_INJECTION = (process.env.GRPC_XDS_EXPERIMENTAL_FAULT_INJECTION ?? 'true') === 'true';
-export const EXPERIMENTAL_OUTLIER_DETECTION = process.env.GRPC_EXPERIMENTAL_ENABLE_OUTLIER_DETECTION === 'true';
+export const EXPERIMENTAL_OUTLIER_DETECTION = (process.env.GRPC_EXPERIMENTAL_ENABLE_OUTLIER_DETECTION ?? 'true') === 'true';