Patch 1 (#8325)

* Update outdated doc parts

- The cache implementation moved from `Common` to `doctrine/cache`
- APCu is mor appropiate nowadays I guess
- AbstractQuery::useResultCache() is deprecated since 2.7

* Fix wrong argument

* Fix wrong arguments and remove useless line

docs/en/reference/caching.rst

@@ -1,8 +1,8 @@
 Caching
 =======
 
-Doctrine provides cache drivers in the ``Common`` package for some
-of the most popular caching implementations such as APC, Memcache
+Doctrine provides cache drivers in the ``doctrine/cache`` package for some
+of the most popular caching implementations such as APCu, Memcache
 and Xcache. We also provide an ``ArrayCache`` driver which stores
 the data in a PHP array. Obviously, when using ``ArrayCache``, the 
 cache does not persist between requests, but this is useful for 
@@ -306,7 +306,7 @@ the result cache.
 
     <?php
     $query = $em->createQuery('select u from \Entities\User u');
-    $query->useResultCache(true);
+    $query->enableResultCache();
 
 You can also configure an individual query to use a different
 result cache driver.
@@ -317,19 +317,18 @@ result cache driver.
     $cacheDriver = new \Doctrine\Common\Cache\PhpFileCache(
         '/path/to/writable/directory'
     );
-    $config = new \Doctrine\ORM\Configuration();
     $query->setResultCacheDriver($cacheDriver);
 
 .. note::
 
     Setting the result cache driver on the query will
     automatically enable the result cache for the query. If you want to
-    disable it pass false to ``useResultCache()``.
+    disable it use ``disableResultCache()``.
 
     ::
 
         <?php
-        $query->useResultCache(false);
+        $query->disableResultCache();
 
 
 If you want to set the time the cache has to live you can use the
@@ -350,12 +349,12 @@ yourself with the ``setResultCacheId()`` method.
     $query->setResultCacheId('my_custom_id');
 
 You can also set the lifetime and cache ID by passing the values as
-the second and third argument to ``useResultCache()``.
+the first and second argument to ``enableResultCache()``.
 
 .. code-block:: php
 
     <?php
-    $query->useResultCache(true, 3600, 'my_custom_id');
+    $query->enableResultCache(3600, 'my_custom_id');
 
 Metadata Cache
 ~~~~~~~~~~~~~~