fixed failing unit tests

Author: Mpdreamz

src/Elasticsearch.Net/Connection/InMemoryConnection.cs

@@ -21,7 +21,7 @@ public InMemoryConnection()
 		public InMemoryConnection(IConnectionConfigurationValues settings)
 			: base(settings)
 		{
-
+			_statusCode = 200;
 		}
 
 		public InMemoryConnection(IConnectionConfigurationValues settings, string fixedResult, int statusCode = 200)

src/Elasticsearch.Net/Exceptions/ElasticsearchServerException.cs

@@ -8,7 +8,7 @@ namespace Elasticsearch.Net
 {
 	public class ElasticsearchServerException : Exception
 	{
-		private static readonly Regex ExceptionSplitter = new Regex(@"^([^\[]+?)\[(.+)\]$", RegexOptions.Singleline);
+		private static readonly Regex ExceptionSplitter = new Regex(@"^([^\[]*?)\[(.*)\]", RegexOptions.Singleline);
 		private static readonly string _couldNotParseServerException = "Could not parse server exception";
 
 		public int Status { get; set; }