DATAMONGO-2149 - Polishing.

Add ticket reference to follow-up ticket regarding array matching on partial DBRef expressions.

Related ticket: DATAMONGO-2154

Original pull request: #623.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/QueryMapper.java

@@ -680,7 +680,7 @@ public class QueryMapper {
 		/**
 		 *
 		 * @return {@literal true} if key may hold a DbRef.
-		 * @since 2.0.13
+		 * @since 2.1.4
 		 */
 		public boolean mayHoldDbRef() {
 			return !NON_DBREF_CONVERTING_KEYWORDS.contains(key);

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/AbstractPersonRepositoryIntegrationTests.java

@@ -1274,7 +1274,7 @@ public abstract class AbstractPersonRepositoryIntegrationTests {
 		assertThat(target.getShippingAddresses()).hasSize(1);
 	}
 
-	@Test // DATAMONGO-2149
+	@Test // DATAMONGO-2149, DATAMONGO-2154
 	@Ignore("This one fails due to Json parse exception within MongoDB")
 	public void annotatedQueryShouldAllowPositionalParameterInFieldsProjectionWithDbRef() {