provider: Hardcode Global Accelerator SDK Region to us-west-2 and Shi…

…eld SDK Region to us-east-1

References:

* https://docs.aws.amazon.com/general/latest/gr/rande.html#global_accelerator_region
* https://docs.aws.amazon.com/general/latest/gr/rande.html#shield_region

Global AWS services sometimes only use a single region for their endpoint. As a past precedent we have hardcoded the Route 53 SDK Region to us-east-1. Following the current AWS Regions and Endpoints documentation, we do the same type of SDK configuration for Global Accelerator (endpoint is only in us-west-2) and Shield (endpoint is only in us-east-1).

aws/config.go

@@ -390,7 +390,7 @@ func (c *Config) Client() (interface{}, error) {
 		fsxconn:                             fsx.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["fsx"])})),
 		gameliftconn:                        gamelift.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["gamelift"])})),
 		glacierconn:                         glacier.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["glacier"])})),
-		globalacceleratorconn:               globalaccelerator.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["globalaccelerator"])})),
+		globalacceleratorconn:               globalaccelerator.New(sess.Copy(&aws.Config{Region: aws.String("us-west-2"), Endpoint: aws.String(c.Endpoints["globalaccelerator"])})),
 		glueconn:                            glue.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["glue"])})),
 		guarddutyconn:                       guardduty.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["guardduty"])})),
 		iamconn:                             iam.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["iam"])})),
@@ -439,7 +439,7 @@ func (c *Config) Client() (interface{}, error) {
 		serverlessapplicationrepositoryconn: serverlessapplicationrepository.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["serverlessrepo"])})),
 		sesConn:                             ses.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["ses"])})),
 		sfnconn:                             sfn.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["stepfunctions"])})),
-		shieldconn:                          shield.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["shield"])})),
+		shieldconn:                          shield.New(sess.Copy(&aws.Config{Region: aws.String("us-east-1"), Endpoint: aws.String(c.Endpoints["shield"])})),
 		simpledbconn:                        simpledb.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["sdb"])})),
 		snsconn:                             sns.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["sns"])})),
 		sqsconn:                             sqs.New(sess.Copy(&aws.Config{Endpoint: aws.String(c.Endpoints["sqs"])})),