Tidy up some exception class names

spring-batch-samples/src/main/java/org/springframework/batch/sample/item/writer/OrderWriter.java

@@ -16,7 +16,7 @@
 
 package org.springframework.batch.sample.item.writer;
 
-import org.springframework.batch.io.exception.BatchCriticalException;
+import org.springframework.batch.io.exception.InfrastructureException;
 import org.springframework.batch.item.writer.DelegatingItemWriter;
 import org.springframework.batch.sample.domain.Order;
 
@@ -25,7 +25,7 @@ import org.springframework.batch.sample.domain.Order;
 public class OrderWriter extends DelegatingItemWriter {
     public Object doProcess(Object data) {
         if (!(data instanceof Order)) {
-            throw new BatchCriticalException("OrderProcessor can process only Order objects");
+            throw new InfrastructureException("OrderProcessor can process only Order objects");
         }
         return data;
     }

spring-batch-samples/src/main/java/org/springframework/batch/sample/tasklet/ExceptionThrowingItemReaderProxy.java

@@ -17,7 +17,7 @@
 package org.springframework.batch.sample.tasklet;
 
 
-import org.springframework.batch.io.exception.BatchCriticalException;
+import org.springframework.batch.io.exception.InfrastructureException;
 import org.springframework.batch.item.ItemReader;
 import org.springframework.batch.item.reader.DelegatingItemReader;
 
@@ -49,7 +49,7 @@ public class ExceptionThrowingItemReaderProxy extends DelegatingItemReader {
 		
 		counter++;
 		if (counter == throwExceptionOnRecordNumber) {
-			throw new BatchCriticalException("Planned failure on count="+counter);
+			throw new InfrastructureException("Planned failure on count="+counter);
 		}
 		
 		return super.read();