[multisite:new] Use correct  property in example.sites.php search (#3007)
[multisite:new] Use correct  property in example.sites.php search (#3007)

Use $this->appRoot, $this->root is empty, which breaks
example.sites.php -file test.
revagomes/DrupalConsole,revagomes/DrupalConsole,revagomes/DrupalConsole