change signature: do not show conflicts about non-changed param names

java/java-tests/testData/refactoring/changeSignature/ParamNameNoConflict.java

@@ -0,0 +1,11 @@
+class D {
+    void f<caret>oo(Object o){}
+}
+
+class DImpl extends D {
+    void foo(Object o1) {
+        super.foo(o1);
+        int o = 0;
+        System.out.println(o);
+    }
+}

java/java-tests/testData/refactoring/changeSignature/ParamNameNoConflict_after.java

@@ -0,0 +1,11 @@
+class D {
+    void foo(Object o, boolean b){}
+}
+
+class DImpl extends D {
+    void foo(Object o1, boolean b) {
+        super.foo(o1, b);
+        int o = 0;
+        System.out.println(o);
+    }
+}