Fixed issue which started in version 1.6.0

Fix: DELETE request validator removed from input_filter keyword and need to manually specify before usage. Added test calling testReturnsNothingOnDeleteRequestIfContentIsInValidAndValidationSetViaInputFilterKeyword test/ContentValidationListenerTest.php code styling fixes

Author: Tigran Makaryan

src/ContentValidationListener.php

@@ -379,7 +379,7 @@ protected function getInputFilterService($controllerService, $method, $isCollect
  return $this->config[$controllerService][$method];
  }
 
- if (in_array($method, $this->methodsWithoutBodies)) {
+ if (in_array($method, $this->methodsWithoutBodies) || $method === 'DELETE') {
  return false;
  }