Cleanup deprecated symbol usages in testData

compiler/testData/codegen/boxWithStdlib/reflection/call/exceptionHappened.kt

@@ -10,7 +10,7 @@ fun box(): String {
     try {
         ::fail.call("OK")
     } catch (e: InvocationTargetException) {
-        return e.getTargetException().getMessage().toString()
+        return e.getTargetException().message.toString()
     }
 
     return "Fail: no exception was thrown"

compiler/testData/codegen/boxWithStdlib/reflection/call/incorrectNumberOfArguments.kt

@@ -19,8 +19,8 @@ object O {
 }
 
 fun check(callable: KCallable<*>, vararg args: Any?) {
-    val expected = callable.parameters.size()
-    val actual = args.size()
+    val expected = callable.parameters.size
+    val actual = args.size
 
     if (expected == actual) {
         throw AssertionError("Bad test case: expected and actual number of arguments should differ (was $expected vs $actual)")
@@ -32,10 +32,10 @@ fun check(callable: KCallable<*>, vararg args: Any?) {
         callable.call(*args)
         throw AssertionError("Fail: an IllegalArgumentException should have been thrown")
     } catch (e: IllegalArgumentException) {
-        if (e.getMessage() != expectedExceptionMessage) {
+        if (e.message != expectedExceptionMessage) {
             // This most probably means that we don't check number of passed arguments in reflection
             // and the default check from Java reflection yields an IllegalArgumentException, but with a not that helpful message
-            throw AssertionError("Fail: an exception with an unrecognized message was thrown: \"${e.getMessage()}\"" +
+            throw AssertionError("Fail: an exception with an unrecognized message was thrown: \"${e.message}\"" +
                                  "\nExpected message was: $expectedExceptionMessage")
         }
     }

compiler/testData/codegen/boxWithStdlib/reflection/call/simpleTopLevelFunctions.kt

@@ -1,4 +1,4 @@
-fun String.foo(): Int = length()
+fun String.foo(): Int = length
 
 var state = "Fail"