chore: make generate_index_ts() deterministic (#497)

Fixes googleapis/synthtool#1103
Source-Link: googleapis/synthtool@c3e41da
Post-Processor: gcr.io/repo-automation-bots/owlbot-nodejs:latest@sha256:e37a815333a6f3e14d8532efe90cba8aa0d34210f8c0fdbdd9e6a34dcbe51e96

Author: gcf-owl-bot[bot]

packages/google-cloud-dataproc/src/index.ts

@@ -16,8 +16,8 @@
 // ** https://github.com/googleapis/synthtool **
 // ** All changes to this file may be overwritten. **
 
-import * as v1beta2 from './v1beta2';
 import * as v1 from './v1';
+import * as v1beta2 from './v1beta2';
 
 const AutoscalingPolicyServiceClient = v1.AutoscalingPolicyServiceClient;
 type AutoscalingPolicyServiceClient = v1.AutoscalingPolicyServiceClient;
@@ -29,16 +29,16 @@ const WorkflowTemplateServiceClient = v1.WorkflowTemplateServiceClient;
 type WorkflowTemplateServiceClient = v1.WorkflowTemplateServiceClient;
 
 export {
-  v1beta2,
   v1,
+  v1beta2,
   AutoscalingPolicyServiceClient,
   ClusterControllerClient,
   JobControllerClient,
   WorkflowTemplateServiceClient,
 };
 export default {
-  v1beta2,
   v1,
+  v1beta2,
   AutoscalingPolicyServiceClient,
   ClusterControllerClient,
   JobControllerClient,