Mark deprecated as a warning

#KT-3252 Fixed

idea/testData/highlighter/deprecated/RangeTo.kt

@@ -1,6 +1,9 @@
-class MyClass { }
+class MyClass {
+  val i = 1
+}
 
 deprecated("Use A instead") fun MyClass.rangeTo(i: MyClass): IntIterator {
+    i.i
     throw Exception()
 }
 
@@ -8,7 +11,7 @@ fun test() {
     val x1 = MyClass()
     val x2 = MyClass()
 
-    for (i in x1<info descr="'fun rangeTo(i : MyClass)' is deprecated. Use A instead">..</info>x2) {
+    for (i in x1<warning descr="'fun rangeTo(i : MyClass)' is deprecated. Use A instead">..</warning>x2) {
 
     }
 }