jdk8 l10n resource file translation update 3 - jaxp

This is a bug used to integrate l10n resource file updates for jdk8 for files in "jaxp" repository.

This issue only tracks the resource files translated in jdk8 message drop30, which included only .properties files.
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/DatatypeMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/DOMMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/JAXPValidationMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/SAXMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/XIncludeMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/XMLMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/XMLSchemaMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/XMLSerializerMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/msg/XPointerMessages.properties
jaxp/src/com/sun/org/apache/xerces/internal/impl/xpath/regex/message.properties

.java files will be translated in message drop40 in August.