Clean up test data after end of the test

compiler/tests/org/jetbrains/jet/codegen/CheckLocalVariablesTableTest.java

@@ -62,9 +62,19 @@ public class CheckLocalVariablesTableTest extends TestCaseWithTmpdir {
     }
 
     @Override
-    protected void runTest() throws Throwable {
+    protected void setUp() throws Exception {
+        super.setUp();
         jetCoreEnvironment = JetTestUtils.createEnvironmentWithMockJdkAndIdeaAnnotations(myTestRootDisposable);
+    }
 
+    @Override
+    protected void tearDown() throws Exception {
+        jetCoreEnvironment = null;
+        super.tearDown();
+    }
+
+    @Override
+    protected void runTest() throws Throwable {
         String text = FileUtil.loadFile(ktFile);
 
         JetFile psiFile = JetTestUtils.createFile(ktFile.getName(), text, jetCoreEnvironment.getProject());

compiler/tests/org/jetbrains/jet/codegen/flags/AbstractWriteFlagsTest.java

@@ -50,6 +50,12 @@ public abstract class AbstractWriteFlagsTest extends UsefulTestCase {
         jetCoreEnvironment = JetTestUtils.createEnvironmentWithMockJdkAndIdeaAnnotations(myTestRootDisposable, ConfigurationKind.JDK_ONLY);
     }
 
+    @Override
+    protected void tearDown() throws Exception {
+        jetCoreEnvironment = null;
+        super.tearDown();
+    }
+
     protected void doTest(String path) throws IOException {
         File ktFile = new File(path);
         assertTrue("Cannot find a file " + ktFile.getAbsolutePath(), ktFile.exists());