XML parsing tests pass on non-English locales now, plus a revised exception message and some minor polishing

Issue: SPR-13136
(cherry picked from commit 38b8262e1e)

spring-web/src/main/java/org/springframework/http/converter/json/AbstractJackson2HttpMessageConverter.java

@@ -221,7 +221,7 @@ public abstract class AbstractJackson2HttpMessageConverter extends AbstractGener
 			return this.objectMapper.readValue(inputMessage.getBody(), javaType);
 		}
 		catch (IOException ex) {
-			throw new HttpMessageNotReadableException("Could not read JSON: " + ex.getMessage(), ex);
+			throw new HttpMessageNotReadableException("Could not read document: " + ex.getMessage(), ex);
 		}
 	}
 

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperBuilder.java

@@ -27,7 +27,6 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.TimeZone;
-
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLResolver;
 

spring-web/src/main/java/org/springframework/http/converter/xml/Jaxb2RootElementHttpMessageConverter.java

@@ -18,7 +18,6 @@ package org.springframework.http.converter.xml;
 
 import java.io.IOException;
 import java.io.StringReader;
-
 import javax.xml.bind.JAXBElement;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.MarshalException;

spring-web/src/main/java/org/springframework/http/converter/xml/SourceHttpMessageConverter.java

@@ -23,7 +23,6 @@ import java.io.OutputStream;
 import java.io.StringReader;
 import java.util.HashSet;
 import java.util.Set;
-
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;