Update checkstyle to version 6.19

Change-Id: I32787f2a5f4f4b17fd4cdcf9bd2eb3903dcecfff
diff --git a/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/manager/impl/SfcManager.java b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/manager/impl/SfcManager.java
index b71fec7..eb63917 100644
--- a/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/manager/impl/SfcManager.java
+++ b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/manager/impl/SfcManager.java
@@ -148,11 +148,11 @@
 
         nshSpiPortChainMap = storageService.<PortChainId, Integer>eventuallyConsistentMapBuilder()
                 .withName("nshSpiPortChainMap").withSerializer(serializer)
-                .withTimestampProvider((k, v) ->new WallClockTimestamp()).build();
+                .withTimestampProvider((k, v) -> new WallClockTimestamp()).build();
 
         portChainFiveTupleMap = storageService.<PortChainId, List<FiveTuple>>eventuallyConsistentMapBuilder()
                 .withName("portChainFiveTupleMap").withSerializer(serializer)
-                .withTimestampProvider((k, v) ->new WallClockTimestamp()).build();
+                .withTimestampProvider((k, v) -> new WallClockTimestamp()).build();
 
         nshSpiIdFreeList = storageService.<Integer>setBuilder()
                 .withName("nshSpiIdDeletedList")