[Test] Use rethrow for checked exception in java-written tests

In 9b5a9ccb `throws Exception` was removed from java test sources and
  all checked exceptions were wrapped with `RuntimeException`

But it was forgotten that there is a `rethrow` utility, which doesn't
  wrap exception but makes the javac happy at the same time

compiler/tests-common/tests/org/jetbrains/kotlin/integration/KotlinIntegrationTestBase.java

@@ -35,6 +35,7 @@ import org.jetbrains.kotlin.test.KotlinTestUtils;
 import org.jetbrains.kotlin.test.TestCaseWithTmpdir;
 import org.jetbrains.kotlin.test.WithMutedInDatabaseRunTest;
 import org.jetbrains.kotlin.test.util.KtTestUtil;
+import org.jetbrains.kotlin.utils.ExceptionUtilsKt;
 import org.jetbrains.kotlin.utils.KotlinPaths;
 import org.jetbrains.kotlin.utils.PathUtil;
 
@@ -63,7 +64,7 @@ public abstract class KotlinIntegrationTestBase extends TestCaseWithTmpdir {
         try {
             exitCode = runProcess(commandLine, executionLog);
         } catch (ExecutionException e) {
-            throw new RuntimeException(e);
+            throw ExceptionUtilsKt.rethrow(e);
         }
 
         if (logName == null) {