Feature/reliable connection (#44)

* Initial commit of reliable connection port

* Made ReliableSqlConnection inherit from DbConnection instead of IDbConnection

* Cleanup

* Fixed autocomplete service to use reliable connection

* Fix copyright headers

* Renamed ConnectResponse.Server to ServerInfo

* Removed unused using

* Addressing code review feedback

test/Microsoft.SqlTools.ServiceLayer.Test/Connection/ConnectionServiceTests.cs

@@ -256,7 +256,6 @@ namespace Microsoft.SqlTools.ServiceLayer.Test.Connection
             
             // check that the connection was successful
             Assert.NotEmpty(connectionResult.ConnectionId);
-            Assert.Null(connectionResult.Messages);
         }
 
         /// <summary>