Added load java test with deep Java-Kotlin subclassing.

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 "";
+    }
+}