Re-order shutdownLock fields in cluster declaration

License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>

cluster.go

@@ -56,15 +56,18 @@ type Cluster struct {
 	allocator PinAllocator
 	informer  Informer
 
-	shutdownLock sync.Mutex
-	shutdownB    bool
-	removed      bool
 	doneCh  chan struct{}
 	readyCh chan struct{}
 	readyB  bool
 	wg      sync.WaitGroup
 
+	// peerAdd
 	paMux sync.Mutex
+
+	// shutdown function and related variables
+	shutdownLock sync.Mutex
+	shutdownB    bool
+	removed      bool
 }
 
 // NewCluster builds a new IPFS Cluster peer. It initializes a LibP2P host,