provider/aws: aws_s3_bucket acceleration_status not available in china

or us-gov

Fixes #7969

`acceleration_status` is not available in China or US-Gov data centers.
Even querying for this will give the following:

```
Error refreshing state: 1 error(s) occurred:

2016/08/04 13:58:52 [DEBUG] plugin: waiting for all plugin processes to
complete...
* aws_s3_bucket.registry_cn: UnsupportedArgument: The request contained
* an unsupported argument.
        status code: 400, request id: F74BA6AA0985B103
```

We are going to stop any Read calls for acceleration status from these
data centers

```
% make testacc TEST=./builtin/providers/aws
% TESTARGS='-run=TestAccAWSS3Bucket_'                                  ✹
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSS3Bucket_
-timeout 120m
=== RUN   TestAccAWSS3Bucket_Notification
--- PASS: TestAccAWSS3Bucket_Notification (409.46s)
=== RUN   TestAccAWSS3Bucket_NotificationWithoutFilter
--- PASS: TestAccAWSS3Bucket_NotificationWithoutFilter (166.84s)
=== RUN   TestAccAWSS3Bucket_basic
--- PASS: TestAccAWSS3Bucket_basic (133.48s)
=== RUN   TestAccAWSS3Bucket_acceleration
--- PASS: TestAccAWSS3Bucket_acceleration (282.06s)
=== RUN   TestAccAWSS3Bucket_Policy
--- PASS: TestAccAWSS3Bucket_Policy (332.14s)
=== RUN   TestAccAWSS3Bucket_UpdateAcl
--- PASS: TestAccAWSS3Bucket_UpdateAcl (225.96s)
=== RUN   TestAccAWSS3Bucket_Website_Simple
--- PASS: TestAccAWSS3Bucket_Website_Simple (358.15s)
=== RUN   TestAccAWSS3Bucket_WebsiteRedirect
--- PASS: TestAccAWSS3Bucket_WebsiteRedirect (380.38s)
=== RUN   TestAccAWSS3Bucket_WebsiteRoutingRules
--- PASS: TestAccAWSS3Bucket_WebsiteRoutingRules (258.29s)
=== RUN   TestAccAWSS3Bucket_shouldFailNotFound
--- PASS: TestAccAWSS3Bucket_shouldFailNotFound (92.24s)
=== RUN   TestAccAWSS3Bucket_Versioning
--- PASS: TestAccAWSS3Bucket_Versioning (654.19s)
=== RUN   TestAccAWSS3Bucket_Cors
--- PASS: TestAccAWSS3Bucket_Cors (143.58s)
=== RUN   TestAccAWSS3Bucket_Logging
--- PASS: TestAccAWSS3Bucket_Logging (249.79s)
=== RUN   TestAccAWSS3Bucket_Lifecycle
--- PASS: TestAccAWSS3Bucket_Lifecycle (259.87s)
PASS
ok      github.com/hashicorp/terraform/builtin/providers/aws
3946.464s
```

Running these over a 4G tethering connection has been painful :)

builtin/providers/aws/resource_aws_s3_bucket.go

@@ -538,15 +538,17 @@ func resourceAwsS3BucketRead(d *schema.ResourceData, meta interface{}) error {
 		}
 	}
 
-	//read the acceleration status
-	accelerate, err := s3conn.GetBucketAccelerateConfiguration(&s3.GetBucketAccelerateConfigurationInput{
-		Bucket: aws.String(d.Id()),
-	})
-	log.Printf("[DEBUG] S3 bucket: %s, read Acceleration: %v", d.Id(), accelerate)
-	if err != nil {
-		return err
+	if meta.(*AWSClient).region != "cn-north-1" || meta.(*AWSClient).region != "us-gov-west-1" {
+		//read the acceleration status
+		accelerate, err := s3conn.GetBucketAccelerateConfiguration(&s3.GetBucketAccelerateConfigurationInput{
+			Bucket: aws.String(d.Id()),
+		})
+		log.Printf("[DEBUG] S3 bucket: %s, read Acceleration: %v", d.Id(), accelerate)
+		if err != nil {
+			return err
+		}
+		d.Set("acceleration_status", accelerate.Status)
 	}
-	d.Set("acceleration_status", accelerate.Status)
 
 	// Read the logging configuration
 	logging, err := s3conn.GetBucketLogging(&s3.GetBucketLoggingInput{

website/source/docs/providers/aws/r/s3_bucket.html.markdown

@@ -174,6 +174,8 @@ The following arguments are supported:
 * `lifecycle_rule` - (Optional) A configuration of [object lifecycle management](http://docs.aws.amazon.com/AmazonS3/latest/dev/object-lifecycle-mgmt.html) (documented below).
 * `acceleration_status` - (Optional) Sets the accelerate configuration of an existing bucket. Can be `Enabled` or `Suspended`.
 
+~> **NOTE:** You cannot use `acceleration_status` in `cn-north-1` or `us-gov-west-1` 
+
 The `website` object supports the following:
 
 * `index_document` - (Required, unless using `redirect_all_requests_to`) Amazon S3 returns this index document when requests are made to the root domain or any of the subfolders.