Merge boxWithJava testData into box, delete BoxWithJava test

compiler/testData/codegen/box/traits/abstractClassInheritsFromInterface.kt

@@ -0,0 +1,19 @@
+// FILE: ExtendsKCWithT.java
+
+public class ExtendsKCWithT extends KC {
+    public static String bar() {
+        return new ExtendsKCWithT().foo();
+    }
+}
+
+// FILE: KC.kt
+
+// KT-3407 Implementing (in Java) an abstract Kotlin class that implements a trait does not respect trait method definition
+
+interface  T {
+    fun foo() = "OK"
+}
+
+abstract class KC: T {}
+
+fun box() = ExtendsKCWithT.bar()

compiler/testData/codegen/box/traits/inheritJavaInterface.kt

@@ -0,0 +1,20 @@
+// FILE: MyInt.java
+
+public interface MyInt {
+
+    String test();
+}
+
+// FILE: test.kt
+
+interface A : MyInt {
+    override public fun test(): String? {
+        return "OK"
+    }
+}
+
+class B: A
+
+fun box() : String {
+    return B().test()!!
+}

compiler/testData/codegen/box/traits/interfaceDefaultImpls.kt

@@ -0,0 +1,20 @@
+// FILE: B.java
+
+class B {
+    static String test(A x) {
+        return A.DefaultImpls.foo(x);
+    }
+}
+
+// FILE: main.kt
+
+interface A {
+    fun foo() = "OK"
+}
+
+fun box(): String {
+    val result = B.test(object : A {})
+    if (result != "OK") return "fail: $result"
+
+    return "OK"
+}