public function createTaxRule()
{
$faker = $this->getFaker();
$TargetTaxRule = $this->app['eccube.repository.tax_rule']->newTaxRule();
$TargetTaxRule->setTaxRate($faker->randomNumber(2));
$now = new \DateTime();
$TargetTaxRule->setApplyDate($now);
$this->app['orm.em']->persist($TargetTaxRule);
$this->app['orm.em']->flush();
return $TargetTaxRule;
}