fixed usage of setUp in tests

src/Symfony/Component/Lock/Tests/Store/CombinedStoreTest.php

@@ -58,7 +58,7 @@ class CombinedStoreTest extends AbstractStoreTest
     /** @var CombinedStore */
     private $store;
 
-    public function setup()
+    protected function setUp()
     {
         $this->strategy = $this->getMockBuilder(StrategyInterface::class)->getMock();
         $this->store1 = $this->getMockBuilder(StoreInterface::class)->getMock();

src/Symfony/Component/Lock/Tests/Strategy/ConsensusStrategyTest.php

@@ -22,7 +22,7 @@ class ConsensusStrategyTest extends TestCase
     /** @var ConsensusStrategy */
     private $strategy;
 
-    public function setup()
+    protected function setUp()
     {
         $this->strategy = new ConsensusStrategy();
     }

src/Symfony/Component/Lock/Tests/Strategy/UnanimousStrategyTest.php

@@ -22,7 +22,7 @@ class UnanimousStrategyTest extends TestCase
     /** @var UnanimousStrategy */
     private $strategy;
 
-    public function setup()
+    protected function setUp()
     {
         $this->strategy = new UnanimousStrategy();
     }