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

#KT-18786 fixed

j2k/testData/fileOrElement/nullability/nullableInitializer1.kt

@@ -1,11 +1,11 @@
 class Test {
-    fun nullableString(p: Int): String? {
-        return if (p > 0) "response" else null
-    }
 
     private var nullableInitializerField = nullableString(3)
     private val nullableInitializerFieldFinal = nullableString(3)
     var nullableInitializerPublicField = nullableString(3)
+    fun nullableString(p: Int): String? {
+        return if (p > 0) "response" else null
+    }
 
     fun testProperty() {
         nullableInitializerField = "aaa"

j2k/testData/fileOrElement/nullability/nullableInitializer2.kt

@@ -1,11 +1,11 @@
 // ERROR: Type mismatch: inferred type is String? but String was expected
 class TestJava {
-    fun nullableObj(p: Int): Any? {
-        return if (p > 0) "response" else null
-    }
 
     var nullableInitializerFieldCast: String = nullableObj(3) as String?
     private val nullableInitializerPrivateFieldCast = nullableObj(3) as String?
+    fun nullableObj(p: Int): Any? {
+        return if (p > 0) "response" else null
+    }
 
     fun testProperty() {
         nullableInitializerFieldCast[0]

j2k/testData/fileOrElement/nullability/nullableInitializer3.kt

@@ -1,10 +1,10 @@
 class Test {
-    fun notNullString(p: Int): String {
-        return "response"
-    }
 
     private val notNullInitializerField = notNullString(3)
     var notNullInitializerPublicField = notNullString(3)
+    fun notNullString(p: Int): String {
+        return "response"
+    }
 
     fun testProperty() {
         notNullInitializerField[0]