Added load java test with deep Java-Kotlin subclassing.

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/expected.txt

@@ -0,0 +1,31 @@
+package test
+
+public open class A {
+    public constructor A()
+    public open fun foo() : jet.String
+}
+
+public open class B : test.A {
+    public constructor B()
+    public open override /*1*/ fun foo() : jet.String
+}
+
+public open class C : test.B {
+    public constructor C()
+    public open override /*1*/ fun foo() : jet.String
+}
+
+public open class D : test.C {
+    public constructor D()
+    public open override /*1*/ fun foo() : jet.String
+}
+
+public open class E : test.D {
+    public constructor E()
+    public open override /*1*/ fun foo() : jet.String
+}
+
+public open class F : test.E {
+    public constructor F()
+    public open override /*1*/ fun foo() : jet.String
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/java/test/B.java

@@ -0,0 +1,7 @@
+package test;
+
+public class B extends A {
+    public String foo() {
+        return "";
+    }
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/java/test/D.java

@@ -0,0 +1,7 @@
+package test;
+
+public class D extends C {
+    public String foo() {
+        return "";
+    }
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/java/test/F.java

@@ -0,0 +1,7 @@
+package test;
+
+public class F extends E {
+    public String foo() {
+        return "";
+    }
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/kotlin/A.kt

@@ -0,0 +1,5 @@
+package test
+
+public open class A {
+    public open fun foo(): String = ""
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/kotlin/C.kt

@@ -0,0 +1,5 @@
+package test
+
+public open class C: B() {
+    override fun foo(): String = ""
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/kotlin/E.kt

@@ -0,0 +1,5 @@
+package test
+
+public open class E: D() {
+    override fun foo(): String = ""
+}