fixed lambda parameter names already used in the context

test/org/jetbrains/java/decompiler/SingleClassesTest.java

@@ -110,6 +110,7 @@ public class SingleClassesTest {
   @Test public void testSwitchOnEnum() { doTest("pkg/TestSwitchOnEnum");}
   //@Test public void TestSwitchOnStrings() { doTest("pkg/TestSwitchOnStrings");}
   @Test public void testVarArgCalls() { doTest("pkg/TestVarArgCalls"); }
+  @Test public void testLambdaParams() { doTest("pkg/TestLambdaParams"); }
 
   private void doTest(String testFile, String... companionFiles) {
     ConsoleDecompiler decompiler = fixture.getDecompiler();