Include context_instance in error_page
Include context_instance in error_page

This fixes bug that after merging translation patch, error pages
no longer include correct url to CSS files

opinkerfi/adagios,zengzhaozheng/adagios,kb2ma/adagios,zengzhaozheng/adagios,opinkerfi/adagios,kaji-project/adagios,opinkerfi/adagios,kaji-project/adagios,zengzhaozheng/adagios,kb2ma/adagios,kaji-project/adagios,kb2ma/adagios,opinkerfi/adagios,zengzhaozheng/adagios,kaji-project/adagios,kb2ma/adagios