extract super class: check for conflicts under progress; skip check for superclass inheritors mismatch - as no actual members would go there

java/java-tests/testData/refactoring/extractSuperClass/noConflictUsingProtectedMethodFromSuper/after/Test.java

@@ -0,0 +1,7 @@
+import java.util.ArrayList;
+
+public class Test extends ArrayList {
+    void x() {
+      removeRange(0, 0);
+    }
+}

java/java-tests/testData/refactoring/extractSuperClass/noConflictUsingProtectedMethodFromSuper/after/TestSubclass.java

@@ -0,0 +1,2 @@
+public class TestSubclass extends Test {
+}

java/java-tests/testData/refactoring/extractSuperClass/noConflictUsingProtectedMethodFromSuper/before/Test.java

@@ -0,0 +1,6 @@
+import java.util.*;
+public class Test extends ArrayList {
+    void x() {
+      removeRange(0, 0);
+    }
+}