Fix typo in test method name

Author: fmbenhassine

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/xml/StaxEventItemReaderTests.java

@@ -111,7 +111,7 @@ public void testAfterPropertiesSet() throws Exception {
 	}
 
 	@Test
-	public void testAfterPropertesSetException() throws Exception {
+	public void testAfterPropertiesSetException() throws Exception {
 
 		source = createNewInputSource();
 		source.setFragmentRootElementName("");