[CI] Silence errors when remove file/dir on test tearDown()

Author: Nyholm

Tests/ConfigCacheTest.php

@@ -30,7 +30,7 @@ protected function tearDown()
 
         foreach ($files as $file) {
             if (file_exists($file)) {
-                unlink($file);
+                @unlink($file);
             }
         }
     }

Tests/Resource/FileExistenceResourceTest.php

@@ -30,7 +30,7 @@ protected function setUp()
     protected function tearDown()
     {
         if (file_exists($this->file)) {
-            unlink($this->file);
+            @unlink($this->file);
         }
     }
 

Tests/Resource/FileResourceTest.php

@@ -30,11 +30,9 @@ protected function setUp()
 
     protected function tearDown()
     {
-        if (!file_exists($this->file)) {
-            return;
+        if (file_exists($this->file)) {
+            @unlink($this->file);
         }
-
-        unlink($this->file);
     }
 
     public function testGetResource()

Tests/ResourceCheckerConfigCacheTest.php

@@ -31,7 +31,7 @@ protected function tearDown()
 
         foreach ($files as $file) {
             if (file_exists($file)) {
-                unlink($file);
+                @unlink($file);
             }
         }
     }