fix memory leaks in tests

plugins/devkit/devkit-java-tests/testSrc/org/jetbrains/idea/devkit/codeInsight/PluginXmlFunctionalTest.groovy

@@ -45,9 +45,16 @@ class PluginXmlFunctionalTest extends JavaCodeInsightFixtureTestCase {
   protected void setUp() throws Exception {
     super.setUp()
     myTempDirFixture = IdeaTestFixtureFactory.getFixtureFactory().createTempDirTestFixture()
+    myTempDirFixture.setUp()
     myFixture.enableInspections(new PluginXmlDomInspection())
   }
 
+  @Override
+  protected void tearDown() throws Exception {
+    myTempDirFixture.tearDown()
+    super.tearDown()
+  }
+
   @Override
   protected String getBasePath() {
     return DevkitJavaTestsUtil.TESTDATA_PATH + "codeInsight"