public static function deleteTestVariables()
{
$db = \Scalr::getDb();
$tables = ['variables', 'account_variables', 'client_environment_variables', 'role_variables', 'farm_variables', 'farm_role_variables', 'server_variables'];
foreach ($tables as $table) {
$db->Execute("DELETE FROM {$table} WHERE name LIKE '%" . self::getInstallationId() . "' OR name = 'SCALR_UI_DEFAULT_STORAGE_RE_USE'");
}
}