Enhance the verification on whether two datasets are the same

indexer-core/src/main/java/org/opengroup/osdu/indexer/util/PropertyUtil.java

@@ -222,7 +222,7 @@ public class PropertyUtil {
         if(rightMap == null) {
             rightMap = new HashMap<>();
         }
-        // If leftMap does not have property A and rightMap has a property A but with null value
+        // If leftMap does not have property A and rightMap has a property A with null value
         // Maps.difference will consider that leftMap and rightMap are different.
         // In our case, they are the same. Using Gson serialization/deserialization to remove
         // the properties with null value on both sides
@@ -248,7 +248,7 @@ public class PropertyUtil {
                     Object left = valueDifference.leftValue();
                     Object right = valueDifference.rightValue();
                     if(left == null && right == null) {
-                        continue;
+                        //Same
                     }
                     else if(left == null || right == null) {
                         changedProperties.add(entry.getKey());

indexer-core/src/test/java/org/opengroup/osdu/indexer/util/PropertyUtilTest.java

@@ -29,7 +29,6 @@ import java.util.List;
 import java.util.Map;
 import lombok.SneakyThrows;
 import org.junit.Assert;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.test.context.junit4.SpringRunner;
@@ -50,7 +49,6 @@ public class PropertyUtilTest {
     }
 
     @Test
-    @Ignore
     public void getValueOfNoneNestedProperty() {
         Map<String, Object> data = this.getDataMap("wellLog.json");
 
@@ -76,9 +74,9 @@ public class PropertyUtilTest {
             Assert.assertTrue(value.containsKey(propertyName));
             Assert.assertNotNull(value.get(propertyName));
         }
+        // The null value is ignored
         for(String propertyName : propertyNamesWithNullValues) {
-            Assert.assertTrue(value.containsKey(propertyName));
-            Assert.assertNull(value.get(propertyName));
+            Assert.assertFalse(value.containsKey(propertyName));
         }
 
         value = PropertyUtil.getValueOfNoneNestedProperty("Curves[].CurveID", data);