improve test and mimick what AWS really does

Author: sanderegg

packages/aws-library/tests/test_ec2_client.py

@@ -624,7 +624,7 @@ async def mock_run_instances(*args, **kwargs) -> Any:
             error_response: dict[str, Any] = {
                 "Error": {
                     "Code": "500",
-                    "Message": "Insufficient capacity.",
+                    "Message": "An error occurred (InsufficientInstanceCapacity) when calling the RunInstances operation (reached max retries: 4): We currently do not have sufficient g4dn.4xlarge capacity in the Availability Zone you requested (us-east-1a). Our system will be working on provisioning additional capacity. You can currently get g4dn.4xlarge capacity by not specifying an Availability Zone in your request or choosing us-east-1b, us-east-1c, us-east-1d, us-east-1f",
                 },
             }
             raise botocore.exceptions.ClientError(error_response, "RunInstances")  # type: ignore
@@ -708,7 +708,7 @@ async def mock_run_instances(*args, **kwargs) -> Any:
         error_response = {
             "Error": {
                 "Code": "500",
-                "Message": "Insufficient capacity.",
+                "Message": "An error occurred (InsufficientInstanceCapacity) when calling the RunInstances operation (reached max retries: 4): We currently do not have sufficient g4dn.4xlarge capacity in the Availability Zone you requested (us-east-1a). Our system will be working on provisioning additional capacity. You can currently get g4dn.4xlarge capacity by not specifying an Availability Zone in your request or choosing us-east-1b, us-east-1c, us-east-1d, us-east-1f",
             },
         }
         raise botocore.exceptions.ClientError(error_response, "RunInstances")  # type: ignore
@@ -785,7 +785,7 @@ async def mock_run_instances(*args, **kwargs):
         error_response = {
             "Error": {
                 "Code": "500",
-                "Message": "Insufficient capacity.",
+                "Message": "An error occurred (InsufficientInstanceCapacity) when calling the RunInstances operation (reached max retries: 4): We currently do not have sufficient g4dn.4xlarge capacity in the Availability Zone you requested (us-east-1a). Our system will be working on provisioning additional capacity. You can currently get g4dn.4xlarge capacity by not specifying an Availability Zone in your request or choosing us-east-1b, us-east-1c, us-east-1d, us-east-1f",
             },
         }
         raise botocore.exceptions.ClientError(error_response, "RunInstances")  # type: ignore