Added tests with adding method to superclass.

jps-plugin/testData/incremental/withJava/javaUsedInKotlin/methodAddedInSuper/Sub.kt

@@ -0,0 +1,4 @@
+public class Sub: Super() {
+    private fun y() {
+    }
+}

jps-plugin/testData/incremental/withJava/javaUsedInKotlin/methodAddedInSuper/Super.java

@@ -0,0 +1,4 @@
+public class Super {
+    public void x() {
+    }
+}

jps-plugin/testData/incremental/withJava/javaUsedInKotlin/methodAddedInSuper/Super.java.new

@@ -0,0 +1,7 @@
+public class Super {
+    public void x() {
+    }
+
+    public void y() {
+    }
+}

jps-plugin/testData/incremental/withJava/javaUsedInKotlin/methodAddedInSuper/build.log

@@ -0,0 +1,15 @@
+Cleaning output files:
+out/production/module/Super.class
+End of files
+Compiling files:
+src/Super.java
+End of files
+Cleaning output files:
+out/production/module/Sub.class
+End of files
+Compiling files:
+src/Sub.kt
+End of files
+COMPILATION FAILED
+Kotlin:ERROR:Cannot weaken access privilege 'public' for 'y' in 'Super'
+Kotlin:ERROR:'y' hides member of supertype 'Super' and needs 'override' modifier