Fix more occurances of the extending Test bug, "reactivating" a total of 200...

Fix more occurances of the extending Test bug, "reactivating" a total of 200 tests. SQLAnywhere is missing and is a bit more annyoing to fix, because of a deep inheritance hierachy.

tests/Doctrine/Tests/DBAL/Platforms/MySQL57PlatformTest.php

@@ -4,7 +4,7 @@ namespace Doctrine\Tests\DBAL\Platforms;
 
 use Doctrine\DBAL\Platforms\MySQL57Platform;
 
-class MySQL57PlatformTest extends MySqlPlatformTest
+class MySQL57PlatformTest extends AbstractMySQLPlatformTestCase
 {
     /**
      * {@inheritdoc}

tests/Doctrine/Tests/DBAL/Platforms/SQLServer2008PlatformTest.php

@@ -4,7 +4,7 @@ namespace Doctrine\Tests\DBAL\Platforms;
 
 use Doctrine\DBAL\Platforms\SQLServer2008Platform;
 
-class SQLServer2008PlatformTest extends SQLServerPlatformTest
+class SQLServer2008PlatformTest extends AbstractSQLServerPlatformTestCase
 {
     public function createPlatform()
     {

tests/Doctrine/Tests/DBAL/Platforms/SQLServer2012PlatformTest.php

@@ -5,7 +5,7 @@ namespace Doctrine\Tests\DBAL\Platforms;
 use Doctrine\DBAL\Platforms\SQLServer2012Platform;
 use Doctrine\DBAL\Schema\Sequence;
 
-class SQLServer2012PlatformTest extends SQLServerPlatformTest
+class SQLServer2012PlatformTest extends AbstractSQLServerPlatformTestCase
 {
     public function createPlatform()
     {