inline parameter: make it public; allow to inline refs to the same non final fields; allow to inline different constants with the same value (IDEA-40700)

java/java-tests/testData/refactoring/inlineParameter/RefConstantAndField.java

@@ -0,0 +1,18 @@
+public class Subject {
+  private int myInt;
+
+  public void wp(int <caret>p) {
+    myInt += p;
+  }
+}
+
+class User {
+  public static int ourStatic = 0;
+  public static final int OUR_CONST = 0;
+
+  private void oper() {
+    Subject subj = new Subject();
+    subj.wp(OUR_CONST);
+    subj.wp(ourStatic);
+  }
+}