[CLEANUP] Move the PHPUnit configuration file (#78)

This will bring the project closer to the default Symfony
project structure.

Author: oliverklee

.github/CONTRIBUTING.md

@@ -92,7 +92,7 @@ When running the integration tests, you will need to specify the database name
 and access credentials on the command line (in the same line):
 
 ```bash
-PHPLIST_DATABASE_NAME=phplist_test PHPLIST_DATABASE_USER=phplist PHPLIST_DATABASE_PASSWORD=batterystaple vendor/bin/phpunit -c Configuration/PHPUnit/phpunit.xml tests/Integration/
+PHPLIST_DATABASE_NAME=phplist_test PHPLIST_DATABASE_USER=phplist PHPLIST_DATABASE_PASSWORD=batterystaple vendor/bin/phpunit tests/Integration/
 ```
 
 

.travis.yml

@@ -63,7 +63,7 @@ script:
 - >
   echo;
   echo "Running the integration tests";
-  vendor/bin/phpunit -c Configuration/PHPUnit/phpunit.xml tests/Integration/;
+  vendor/bin/phpunit tests/Integration/;
 
 - >
   echo;

CHANGELOG.md

@@ -10,6 +10,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - System tests for the test and dev environment (#69)
 
 ### Changed
+- Move the PHPUnit configuration file (#78)
 - Use the renamed phplist/core package (#77)
 - Adopt more of the default Symfony project structure (#73, #74, #75)
 

Configuration/.gitkeep

@@ -5,7 +5,7 @@
          xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/6.2/phpunit.xsd"
          backupGlobals="false"
          colors="true"
-         bootstrap="../../vendor/autoload.php"
+         bootstrap="vendor/autoload.php"
 >
     <php>
         <ini name="error_reporting" value="-1"/>