$HOST causes parsing error on Memcached buckets

From email:

"First is when i try to run the new client against memcached bucket. There is the same issue with $HOST coming from HttpStreamingProvider instead of CarrierPublicationProvider.

System.UriFormatException was caught
HResult=-2146233033
Message=Invalid URI: The hostname could not be parsed.
Source=System
StackTrace:
at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
at Couchbase.Core.ClusterController.UpdateBootstrapList(IBucketConfig bucketConfig) in c:\Temp\couchbase-net-client-master\Src\Couchbase\Core\ClusterController.cs:line 233
at Couchbase.Core.ClusterController.CreateBucket(String bucketName, String password) in c:\Temp\couchbase-net-client-master\Src\Couchbase\Core\ClusterController.cs:line 207
InnerException:
"