[Lock] fix tests for MongoDB

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

@@ -20,7 +20,8 @@ use Symfony\Component\Lock\Store\MongoDbStore;
 
 /**
  * @author Joe Bennett <joe@assimtech.com>
- * @requires extension mongodb
+ *
+ * @requires function \MongoDB\Client::__construct
  */
 class MongoDbStoreTest extends AbstractStoreTest
 {

src/Symfony/Component/Lock/composer.json

@@ -22,6 +22,7 @@
     },
     "require-dev": {
         "doctrine/dbal": "~2.5",
+        "mongodb/mongodb": "~1.1",
         "predis/predis": "~1.0"
     },
     "conflict": {

src/Symfony/Component/Lock/phpunit.xml.dist

@@ -12,6 +12,7 @@
         <ini name="error_reporting" value="-1" />
         <env name="REDIS_HOST" value="localhost" />
         <env name="MEMCACHED_HOST" value="localhost" />
+        <env name="MONGODB_HOST" value="localhost" />
         <env name="ZOOKEEPER_HOST" value="localhost" />
     </php>