Fixed up one off connection clients for Sequelize (if client is already defined …

…simply callback rather than connecting again).

lib/dialects/postgres/connector-manager.js

@@ -106,10 +106,10 @@ module.exports = (function() {
         }
       } else if (client) {
         client.query("SET TIME ZONE 'UTC'").on('end', function() {
-            self.isConnected = true
-            self.client = client
-            emitter.emit('success', done)
-          })
+          self.isConnected = true
+          self.client = client
+          emitter.emit('success', done)
+        })
       } else {
         self.client = null
         emitter.emit('success', done)
@@ -121,9 +121,13 @@ module.exports = (function() {
       this.poolIdentifier = this.pg.pools.getOrCreate(this.sequelize.config)
       this.poolIdentifier.connect(connectCallback)
     } else {
-      //create one-off client
-      this.client = new this.pg.Client(uri)
-      this.client.connect(connectCallback)
+      if (!!this.client) {
+        connectCallback(null, this.client);
+      } else {
+        //create one-off client
+        this.client = new this.pg.Client(uri)
+        this.client.connect(connectCallback)
+      }
     }
 
     return emitter