Connect should return actual DB Name (#42)

- On Connecting to a server with no DB specified, we will actually get a connection to Master or some default DB.
- This DB should be used when notifying others of a new connection, and when returning information to the caller so that the correct name can be displayed in the UI.
- Added basic unit tests to cover this scenario

src/Microsoft.SqlTools.ServiceLayer/Connection/Contracts/ConnectResponse.cs

@@ -19,5 +19,10 @@ namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
         /// Gets or sets any connection error messages
         /// </summary>
         public string Messages { get; set; }
+
+        /// <summary>
+        /// Gets or sets the actual Connection established, including Database Name
+        /// </summary>
+        public ConnectionSummary ConnectionSummary { get; set; }
     }
 }