Lock.java: keep the order of fields and their assignments consistent

Change-Id: I1ba554c982470d18ffbbffc04dc8495c098f34d2

src/main/java/com/googlesource/gerrit/plugins/spannerrefdb/Lock.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/spannerrefdb/Lock.java b/src/main/java/com/googlesource/gerrit/plugins/spannerrefdb/Lock.java
index 287c9e1..b2cdacf 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/spannerrefdb/Lock.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/spannerrefdb/Lock.java
@@ -58,8 +58,8 @@
   private static final int HEARTBEAT_INTERVAL = 2;
   private static final String RECLAIM_LOCK_PREFIX = "RECLAIM";
   private final DatabaseClient dbClient;
-  private final String projectName;
   private final String gerritInstanceId;
+  private final String projectName;
   private final String refName;
   private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
 
@@ -71,10 +71,10 @@
       @GerritInstanceId String gerritInstanceId,
       @Assisted("projectName") String projectName,
       @Assisted("refName") String refName) {
-    this.projectName = projectName;
-    this.refName = refName;
     this.dbClient = dbClient;
     this.gerritInstanceId = gerritInstanceId;
+    this.projectName = projectName;
+    this.refName = refName;
   }
 
   /**