J2K: not initialized field of non-primitive type should have null initializer

#KT-11544 Fixed

j2k/testData/fileOrElement/field/needInitializer.java

@@ -0,0 +1,22 @@
+public class Init {
+    public String field1;
+    public String field2;
+
+    public int field3;
+    public int field4;
+
+    public Init() {
+        field1 = "str";
+        field3 = 1;
+
+        String prop1;
+        prop1 = "aaa";
+
+        String prop2;
+
+        int prop3;
+        prop3 = 1;
+
+        int prop4;
+    }
+}