[Test] Merge box against java tests into codegen black box tests

compiler/testData/codegen/boxAgainstJava/reflection/mapping/javaMethods.kt

@@ -1,4 +1,5 @@
 // WITH_REFLECT
+// MODULE: lib
 // FILE: J.java
 
 public class J {
@@ -11,6 +12,7 @@ public class J {
     }
 }
 
+// MODULE: main(lib)
 // FILE: 1.kt
 
 import kotlin.reflect.*