XML converter should pass contentType AND charset in the render method to the response object

The XML converter is passing the contentType to the response object like this:

public void render(HttpServletResponse response) throws ConverterException {
        response.setContentType("text/xml");

I think it should also add the charset encoding that it gets from the configuration (defaults to UTF-8):

public void render(HttpServletResponse response) throws ConverterException {
        response.setContentType("text/xml;charset=" + encoding);

This would ease development and deployment. As Grails 2.0 uses internally a Tomcat7, but deployments often happen on Tomcat6. AFAIK By passing the already present encoding, no reconfiguration of Tomcat would be necessary.

From http://tomcat.apache.org/tomcat-6.0-doc/config/systemprops.html

org.apache.catalina.STRICT_SERVLET_COMPLIANCE
[...]
a call to Response.getWriter() if no character encoding has been specified will result in subsequent calls to Response.getCharacterEncoding() returning ISO-8859-1 and the Content-Type response header will include a charset=ISO-8859-1 component. (SRV.15.2.22.1)
[...]
If not specified, the default value of false will be used.

This changed to a new system property in tomcat 7
From http://tomcat.apache.org/tomcat-7.0-doc/config/systemprops.html

org.apache.catalina.connector.Response.ENFORCE_ENCODING_IN_GET_WRITER

If this is true then a call to Response.getWriter() if no character encoding has been specified will result in subsequent calls to Response.getCharacterEncoding() returning ISO-8859-1 and the Content-Type response header will include a charset=ISO-8859-1 component. (SRV.15.2.22.1)

If not specified, the default specification compliant value of true will be used.