Fix compilation issues

Author: cowtowncoder

avro/src/main/java/tools/jackson/dataformat/avro/deser/AvroFieldDefaulters.java

@@ -41,12 +41,9 @@ public static AvroFieldReader createDefaulter(String name,
             return new ScalarDefaults.StringDefaults(name, defaultAsNode.asText());
         case START_OBJECT:
             {
-                Iterator<Map.Entry<String,JsonNode>> it = defaultAsNode.fields();
                 List<AvroFieldReader> readers = new ArrayList<>();
-                while (it.hasNext()) {
-                    Map.Entry<String,JsonNode> entry = it.next();
-                    String propName = entry.getKey();
-                    readers.add(createDefaulter(propName, entry.getValue()));
+                for (Map.Entry<String,JsonNode> entry : defaultAsNode.properties()) {
+                    readers.add(createDefaulter(entry.getKey(), entry.getValue()));
                 }
                 return StructDefaults.createObjectDefaults(name, readers);
             }

cbor/src/test/java/tools/jackson/dataformat/cbor/mapper/TreeReadViaMapperTest.java

@@ -26,7 +26,7 @@ public void testSimple() throws Exception
         assertTrue(result.isObject());
 
         ObjectNode main = (ObjectNode) result;
-        assertEquals("Image", main.propertyNames().next());
+        assertEquals("Image", main.propertyNames().iterator().next());
         JsonNode ob = main.iterator().next();
         assertType(ob, ObjectNode.class);
         ObjectNode imageMap = (ObjectNode) ob;

smile/src/test/java/tools/jackson/dataformat/smile/mapper/TreeReadViaMapperTest.java

@@ -26,7 +26,7 @@ public void testSimple() throws Exception
         assertTrue(result.isObject());
 
         ObjectNode main = (ObjectNode) result;
-        assertEquals("Image", main.propertyNames().next());
+        assertEquals("Image", main.propertyNames().iterator().next());
         JsonNode ob = main.iterator().next();
         assertType(ob, ObjectNode.class);
         ObjectNode imageMap = (ObjectNode) ob;