.NET client does not set the HELO correctly

.Net is not provide any information in the HELO not sure how this is related to NCBC-1171

Steps to reproduce

1. Run the following .Net program

   using System;

   using System.Collections.Generic;

   using System.Threading;

   using Couchbase;

   using Couchbase.Configuration.Client;

   namespace CouchbaseLock

   {

   class MainClass

   {

   public static void Main(string[] args)

   {

   ClusterHelper.Initialize();

   var bucket = ClusterHelper.GetBucket("default");

   var doc = new Document<dynamic>

   {

   Id = "NET",

   Content = new

   {

   name = "Couchbase"

   }

   };

   bucket.Upsert(doc.Id, doc);

   }

   }

   }

2. Tail the memcached.log (please note that memcached writes to the log every 30 seconds)

   tail -f /opt/couchbase/var/lib/couchbase/logs/memcached.log.000000.txt

Problem
The HELO from .Net contains no information:

2017-02-14T10:39:28.694876Z NOTICE 43: HELO [ 10.112.171.1:49307 - 10.112.171.101:11210 ]

Here is libcouchbase HELO for comparison

2017-02-13T14:21:44.236528Z NOTICE 43: HELO [libcouchbase/2.7.1] TCP NODELAY [ 10.112.171.1:58688 - 10.112.171.101:11210 ]

Expectation
The HELO from .Net to contain at least the SDK version like the other SDK do. Some SDK like Java go further and provided the JVM details which might also be useful in the .Net case too:

2017-02-13T01:12:41.383199Z NOTICE 50: HELO [couchbase-java-client/${project.version} (git: ${git.commit.id.describe}, core: ${git.commit.id.describe}) (Linux/3.10.0-123.20.1.el7.x86_64 amd64; Java HotSpot(TM) 64-Bit Server VM 1.8.0_45-b14)] TCP NODELAY [ 10.112.151.102:53180 - 10.112.151.102:11210 ]