Merge branch '4.4' into 5.1

* 4.4:
  Use createMock() and use import instead of FQCN

Author: nicolas-grekas

Tests/DotenvTest.php

@@ -14,6 +14,7 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Dotenv\Dotenv;
 use Symfony\Component\Dotenv\Exception\FormatException;
+use Symfony\Component\Dotenv\Exception\PathException;
 
 class DotenvTest extends TestCase
 {
@@ -322,7 +323,7 @@ public function testOverload()
 
     public function testLoadDirectory()
     {
-        $this->expectException(\Symfony\Component\Dotenv\Exception\PathException::class);
+        $this->expectException(PathException::class);
         $dotenv = new Dotenv();
         $dotenv->load(__DIR__);
     }