Fixup incorrect property name

The property in XADataSourceAutoConfigurationTests should be
`data-source-class-name`. Previously the `-name` was missing.

Author: dsyer

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jdbc/XADataSourceAutoConfigurationTests.java

@@ -66,7 +66,7 @@ public void createFromUrl() throws Exception {
 	public void createFromClass() throws Exception {
 		ApplicationContext context = createContext(
 				FromProperties.class,
-				"spring.datasource.xa.data-source-class:org.hsqldb.jdbc.pool.JDBCXADataSource",
+				"spring.datasource.xa.data-source-class-name:org.hsqldb.jdbc.pool.JDBCXADataSource",
 				"spring.datasource.xa.properties.database-name:test");
 		context.getBean(DataSource.class);
 		MockXADataSourceWrapper wrapper = context.getBean(MockXADataSourceWrapper.class);