Don't generate delegation to java default methods

#KT-15226  Fixed

compiler/testData/codegen/java8/box/delegationBy/byMiddleInterface.kt

@@ -0,0 +1,27 @@
+
+// FILE: Base.java
+
+public interface Base {
+    String getValue();
+
+    default String test() {
+        return getValue();
+    }
+}
+
+// FILE: main.kt
+
+public interface BaseKotlin : Base {
+}
+
+
+class Fail : BaseKotlin {
+    override fun getValue() = "Fail"
+}
+
+fun box(): String {
+    val z = object : BaseKotlin by Fail() {
+        override fun getValue() = "OK"
+    }
+    return z.test()
+}

compiler/testData/codegen/java8/box/delegationBy/defaultOverride.kt

@@ -0,0 +1,31 @@
+
+// FILE: Base.java
+
+public interface Base {
+    String getValue();
+
+    default String test() {
+        return getValue();
+    }
+}
+
+// FILE: main.kt
+
+public interface BaseKotlin : Base {
+    override fun getValue() = "OK"
+
+    override fun test(): String {
+        return getValue();
+    }
+}
+
+class OK : BaseKotlin {
+    override fun getValue() = "OK"
+}
+
+fun box(): String {
+    val ok = object : BaseKotlin by OK() {
+        override fun getValue() = "Fail"
+    }
+    return ok.test()
+}

compiler/testData/codegen/java8/box/delegationBy/diamond.kt

@@ -0,0 +1,35 @@
+// FILE: Base.java
+
+public interface Base {
+    String getValue();
+
+    default String test() {
+        return getValue();
+    }
+}
+
+// FILE: Base2.java
+public interface Base2 extends Base {
+
+    default String test() {
+        return "O"  + getValue();
+    }
+}
+
+
+// FILE: main.kt
+
+interface KBase : Base
+
+interface Derived : KBase, Base2
+
+class Fail : Derived {
+    override fun getValue() = "Fail"
+}
+
+fun box(): String {
+    val z = object : Derived by Fail() {
+        override fun getValue() = "K"
+    }
+    return z.test()
+}

compiler/testData/codegen/java8/box/delegationBy/diamond2.kt

@@ -0,0 +1,35 @@
+// FILE: Base.java
+
+public interface Base {
+    String getValue();
+
+    default String test()
+    {
+        return getValue();
+    }
+}
+
+// FILE: Base2.java
+public interface Base2 extends Base {
+
+}
+
+
+// FILE: main.kt
+
+interface KBase : Base {
+    override fun test() = "O" + getValue()
+}
+
+interface Derived : KBase, Base2
+
+class K : Derived {
+    override fun getValue() = "K"
+}
+
+fun box(): String {
+    val z = object : Derived by K() {
+        override fun getValue() = "Fail"
+    }
+    return z.test()
+}

compiler/testData/codegen/java8/box/delegationBy/inClassDeclaration.kt

@@ -0,0 +1,22 @@
+// FILE: Base.java
+
+public interface Base {
+    String getValue();
+
+    default String test() {
+        return getValue();
+    }
+}
+
+// FILE: main.kt
+class Fail : Base {
+    override fun getValue() = "Fail"
+}
+
+class Derived : Base by Fail() {
+    override fun getValue() = "OK"
+}
+
+fun box(): String {
+    return Derived().test()
+}

compiler/testData/codegen/java8/box/delegationBy/mixed.kt

@@ -0,0 +1,32 @@
+// FILE: Base.java
+
+public interface Base extends KBase {
+    String getValue();
+
+    default String test() {
+        return getValue();
+    }
+}
+
+// FILE: main.kt
+interface KBase {
+    fun getValue(): String
+
+    fun test(): String
+}
+
+class Fail : Base {
+    override fun getValue() = "Fail"
+}
+
+fun box(): String {
+    val z1 = object : KBase by Fail() {
+        override fun getValue() = "OK"
+    }
+    if (z1.test() != "Fail") return "fail 1"
+
+    val z2 = object : Base by Fail() {
+        override fun getValue() = "OK"
+    }
+    return z2.test()
+}

compiler/testData/codegen/java8/box/delegationBy/simple.kt

@@ -0,0 +1,21 @@
+// FILE: Base.java
+
+public interface Base {
+    String getValue();
+
+    default String test() {
+        return getValue();
+    }
+}
+
+// FILE: main.kt
+class Fail : Base {
+    override fun getValue() = "Fail"
+}
+
+fun box(): String {
+    val z = object : Base by Fail() {
+        override fun getValue() = "OK"
+    }
+    return z.test()
+}