Clean application after test in compiler tests

It's disposed after Disposer.dispose(myTestRootDisposable) in tearDown and mixing compiler tests
with non-compiler tests may ruin classes initialization with

"com.intellij.util.IncorrectOperationException: Sorry but parent: com.intellij.mock.MockApplicationEx@52439591 has already been disposed"

(cherry picked from commit f3badb6)

compiler/tests-common/org/jetbrains/kotlin/test/KotlinTestWithEnvironment.java

@@ -16,23 +16,15 @@
 
 package org.jetbrains.kotlin.test;
 
-import com.intellij.openapi.application.Application;
-import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.project.Project;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment;
-import org.jetbrains.kotlin.utils.ExceptionUtilsKt;
-
-import java.lang.reflect.Field;
 
 public abstract class KotlinTestWithEnvironment extends KotlinTestWithEnvironmentManagement {
     private KotlinCoreEnvironment environment;
-    private Application application;
 
     @Override
     protected void setUp() throws Exception {
-        application = ApplicationManager.getApplication();
-
         super.setUp();
         environment = createEnvironment();
     }
@@ -42,23 +34,6 @@ public abstract class KotlinTestWithEnvironment extends KotlinTestWithEnvironmen
         removeEnvironment();
         environment = null;
         super.tearDown();
-
-        if (application == null) {
-            resetApplicationToNull();
-        }
-
-        application = null;
-    }
-
-    protected void resetApplicationToNull() {
-        try {
-            Field ourApplicationField = ApplicationManager.class.getDeclaredField("ourApplication");
-            ourApplicationField.setAccessible(true);
-            ourApplicationField.set(null, null);
-        }
-        catch (Exception e) {
-            throw ExceptionUtilsKt.rethrow(e);
-        }
     }
 
     protected abstract KotlinCoreEnvironment createEnvironment() throws Exception;

compiler/tests-common/org/jetbrains/kotlin/test/testFramework/KtUsefulTestCase.java

@@ -17,6 +17,8 @@
 package org.jetbrains.kotlin.test.testFramework;
 
 import com.intellij.openapi.Disposable;
+import com.intellij.openapi.application.Application;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.application.impl.ApplicationInfoImpl;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.openapi.util.Disposer;
@@ -36,6 +38,7 @@ import junit.framework.TestCase;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.kotlin.utils.ExceptionUtilsKt;
 import org.junit.Assert;
 
 import java.io.File;
@@ -55,6 +58,8 @@ public abstract class KtUsefulTestCase extends TestCase {
     private static final Map<String, Long> TOTAL_SETUP_COST_MILLIS = new HashMap<String, Long>();
     private static final Map<String, Long> TOTAL_TEARDOWN_COST_MILLIS = new HashMap<String, Long>();
 
+    private Application application;
+
     @NotNull
     protected final Disposable myTestRootDisposable = new Disposable() {
         @Override
@@ -81,6 +86,8 @@ public abstract class KtUsefulTestCase extends TestCase {
 
     @Override
     protected void setUp() throws Exception {
+        application = ApplicationManager.getApplication();
+
         super.setUp();
 
         String testName =  FileUtil.sanitizeFileName(getTestName(true));
@@ -121,6 +128,23 @@ public abstract class KtUsefulTestCase extends TestCase {
 
         UIUtil.removeLeakingAppleListeners();
         super.tearDown();
+
+        if (application == null) {
+            resetApplicationToNull();
+        }
+
+        application = null;
+    }
+
+    protected void resetApplicationToNull() {
+        try {
+            Field ourApplicationField = ApplicationManager.class.getDeclaredField("ourApplication");
+            ourApplicationField.setAccessible(true);
+            ourApplicationField.set(null, null);
+        }
+        catch (Exception e) {
+            throw ExceptionUtilsKt.rethrow(e);
+        }
     }
 
     private boolean hasTmpFilesToKeep() {