Count not requiring specific property name. (#1414)

Closes #1413.

Author: mikereiche

src/main/java/org/springframework/data/couchbase/core/ReactiveFindByQueryOperationSupport.java

@@ -223,9 +223,8 @@ public Mono<Long> count() {
 					} else {
 						return throwable;
 					}
-				}).flatMapMany(ReactiveQueryResult::rowsAsObject).map(row -> {
-					return row.getLong(TemplateUtils.SELECT_COUNT);
-				}).next();
+				}).flatMapMany(ReactiveQueryResult::rowsAsObject).map(row -> row.getLong(row.getNames().iterator().next()))
+						.next();
 			});
 		}
 

src/test/java/org/springframework/data/couchbase/repository/CouchbaseRepositoryQueryIntegrationTests.java

@@ -431,7 +431,7 @@ void count() {
 
 	@Test
 	void badCount() {
-		assertThrows(CouchbaseQueryExecutionException.class, () -> airportRepository.countBad());
+		assertThrows(NullPointerException.class, () -> airportRepository.countBad());
 	}
 
 	@Test