Drupal8 prep More Joomla! error handling to Joomla! class

mostly just doing this to try out the agile board ... but as we all know CMS code doesn't belong outside CMS specific files.

so will remove this

if ($config->backtrace)

{ $content = self::formatHtmlException($exception) . $content; }

if ($config->userFramework == 'Joomla' &&
class_exists('JError')
)

{ JError::raiseError('CiviCRM-001', $content); }

else

{ echo CRM_Utils_System::theme($content); }