KT-18786: J2K should move all properties to top of class

#KT-18786 fixed

j2k/testData/fileOrElement/comments/comments2.kt

@@ -3,6 +3,8 @@
 package foo
 
 internal class A {
+
+    private /*it's private*/ val field = 0
     fun /* nothing to return */ foo(/* no parameters at all */) {
         // let declare a variable
         // with 2 comments before
@@ -12,8 +14,6 @@ internal class A {
     fun /* we return int*/ foo(/*int*/ p: Int/* parameter p */): Int { /* body is empty */
     }
 
-    private/*it's private*/ val field = 0
-
     /*it's public*/ fun foo(s: String): Char {}
 
     protected/*it's protected*/ fun foo(c: Char) {}