Authentication Exception Message from its key, Explicit Travis build env, and .idea to gitignore

.gitignore

@@ -3,3 +3,4 @@ build
 vendor
 composer.lock
 composer.phar
+.idea

.travis.yml

@@ -1,5 +1,7 @@
 language: php
 
+dist: trusty
+
 matrix:
   fast_finish: true
   include:

Security/Http/Authentication/AuthenticationFailureHandler.php

@@ -38,7 +38,7 @@ public function onAuthenticationFailure(Request $request, AuthenticationExceptio
     {
         $event = new AuthenticationFailureEvent(
             $exception,
-            new JWTAuthenticationFailureResponse($exception->getMessage())
+            new JWTAuthenticationFailureResponse($exception->getMessageKey())
         );
 
         if ($this->dispatcher instanceof ContractsEventDispatcherInterface) {

Tests/Functional/GetTokenTest.php

@@ -62,7 +62,7 @@ public function testGetTokenFromInvalidCredentials()
         $this->assertArrayHasKey('message', $body, 'The response should have a "message" key containing the failure reason.');
         $this->assertArrayHasKey('code', $body, 'The response should have a "code" key containing the response status code.');
 
-        $this->assertSame('Bad credentials.', $body['message']);
+        $this->assertSame('Invalid credentials.', $body['message']);
         $this->assertSame(401, $body['code']);
     }
 }

Tests/Security/Http/Authentication/AuthenticationFailureHandlerTest.php

@@ -32,7 +32,7 @@ public function testOnAuthenticationFailure()
         $this->assertInstanceOf('Symfony\Component\HttpFoundation\JsonResponse', $response);
         $this->assertEquals(401, $response->getStatusCode());
         $this->assertEquals(401, $content['code']);
-        $this->assertEquals($authenticationException->getMessage(), $content['message']);
+        $this->assertEquals($authenticationException->getMessageKey(), $content['message']);
     }
 
     /**
@@ -47,7 +47,7 @@ protected function getRequest()
     }
 
     /**
-     * @return \PHPUnit_Framework_MockObject_MockObject
+     * @return AuthenticationException
      */
     protected function getAuthenticationException()
     {