Clear connection timeout on error (#2015)

Cancel the connection timeout upon stream error, to avoid getting a stream error followed later by a connection error.

Author: adam-nielsen

Diff for: lib/client.js

@@ -251,6 +251,7 @@ Client.prototype._connect = function (callback) {
       ? new Error('Connection terminated')
       : new Error('Connection terminated unexpectedly')
 
+    clearTimeout(connectionTimeoutHandle)
     this._errorAllQueries(error)
 
     if (!this._ending) {