Add messageTemplateParser to XSD
Add messageTemplateParser to XSD

fixes #2344

UgurAldanmaz/NLog,BrutalCode/NLog,304NotModified/NLog,snakefoot/NLog,nazim9214/NLog,ie-zero/NLog,luigiberrettini/NLog,BrutalCode/NLog,UgurAldanmaz/NLog,ie-zero/NLog,nazim9214/NLog,NLog/NLog,luigiberrettini/NLog,sean-gilliam/NLog