Identify machine name on logging upon clock skew error (#188)

lib/pairing.js

@@ -71,10 +71,17 @@ function authorizeCaDownload (caToken) {
 }
 
 function isPaired (deviceId) {
-  const sql = 'select device_id from devices where device_id=$1 and paired=TRUE'
+  const sql = 'select device_id, name from devices where device_id=$1 and paired=TRUE'
 
   return db.oneOrNone(sql, [deviceId])
-    .then(row => row && row.device_id === deviceId)
+    .then(row => {
+      const deviceName = row.name
+      const isDevicePaired = row && row.device_id === deviceId
+      return {
+        deviceName: deviceName,
+        isDevicePaired: isDevicePaired
+      }
+    })
 }
 
 module.exports = {pair, unpair, authorizeCaDownload, isPaired}