Merge branch 'fix/#2638-tear-down-parent-transactions' into 2.5

Backport #2638 to 2.5.x

tests/Doctrine/Tests/DBAL/Functional/PortabilityTest.php

@@ -21,6 +21,8 @@ class PortabilityTest extends \Doctrine\Tests\DbalFunctionalTestCase
         if ($this->portableConnection) {
             $this->portableConnection->close();
         }
+
+        parent::tearDown();
     }
 
     /**

tests/Doctrine/Tests/DBAL/Functional/TemporaryTableTest.php

@@ -25,6 +25,8 @@ class TemporaryTableTest extends \Doctrine\Tests\DbalFunctionalTestCase
                 $this->_conn->exec($this->_conn->getDatabasePlatform()->getDropTemporaryTableSQL($tempTable));
             } catch(\Exception $e) { }
         }
+
+        parent::tearDown();
     }
 
     /**

tests/Doctrine/Tests/DBAL/Functional/Ticket/DBAL630Test.php

@@ -41,6 +41,8 @@ class DBAL630Test extends \Doctrine\Tests\DbalFunctionalTestCase
                 $this->_conn->getWrappedConnection()->setAttribute(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT, false);
             }
         }
+
+        parent::tearDown();
     }
 
     public function testBooleanConversionSqlLiteral()

tests/Doctrine/Tests/DbalFunctionalTestCase.php

@@ -40,7 +40,14 @@ class DbalFunctionalTestCase extends DbalTestCase
         $this->_conn->getConfiguration()->setSQLLogger($this->_sqlLoggerStack);
     }
 
-    protected function onNotSuccessfulTest(\Exception $e)
+    protected function tearDown()
+    {
+        while ($this->_conn->isTransactionActive()) {
+            $this->_conn->rollBack();
+        }
+    }
+
+    protected function onNotSuccessfulTest($e)
     {
         if ($e instanceof \PHPUnit_Framework_AssertionFailedError) {
             throw $e;