pull up: do not rise a conflict if pulled method uses method which would be pulled as abstract (IDEADEV-40999)

java/java-tests/testData/refactoring/pullUp/PullUpAndAbstractize.java

@@ -0,0 +1,11 @@
+public class A2 {
+}
+
+class B2 extends A2 {
+  public void <caret>a() {
+    b();
+  }
+
+  private void b() {
+  }
+}