Fix utf8mb4 on vendor tables

When creating the schema for test these tables use default length for
string: 255. Which fail when using utf8mb4.

> Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes

Also move the `setKeepStaticConnections` in before and after class to
avoid:

> SAVEPOINT DOCTRINE2_SAVEPOINT_2 does not exist

See https://github.com/dmaicher/doctrine-test-bundle#troubleshooting

1 files changed, 12 insertions, 5 deletions

diff --git a/tests/Wallabag/CoreBundle/Command/InstallCommandTest.php b/tests/Wallabag/CoreBundle/Command/InstallCommandTest.php
index 08685408..d8928451 100644
--- a/tests/Wallabag/CoreBundle/Command/InstallCommandTest.php
+++ b/tests/Wallabag/CoreBundle/Command/InstallCommandTest.php
@@ -18,6 +18,18 @@ use Wallabag\CoreBundle\Command\InstallCommand;
 
 class InstallCommandTest extends WallabagCoreTestCase
 {
+    public static function setUpBeforeClass()
+    {
+        // disable doctrine-test-bundle
+        StaticDriver::setKeepStaticConnections(false);
+    }
+
+    public static function tearDownAfterClass()
+    {
+        // enable doctrine-test-bundle
+        StaticDriver::setKeepStaticConnections(true);
+    }
+
     public function setUp()
     {
         parent::setUp();
@@ -51,9 +63,6 @@ class InstallCommandTest extends WallabagCoreTestCase
             parent::setUp();
         }
 
-        // disable doctrine-test-bundle
-        StaticDriver::setKeepStaticConnections(false);
-
         $this->resetDatabase($this->getClient());
     }
 
@@ -72,8 +81,6 @@ class InstallCommandTest extends WallabagCoreTestCase
             $this->resetDatabase($client);
         }
 
-        // enable doctrine-test-bundle
-        StaticDriver::setKeepStaticConnections(true);
         parent::tearDown();
     }