Add IntelliSense binding queue (#73)

* Initial code for binding queue

* Fix-up some of the timeout wait code

* Add some initial test code

* Add missing test file

* Update the binding queue tests

* Add more test coverage and refactor a bit.  Disable reliabile connection until we can fix it..it's holding an open data reader connection.

* A few more test updates

* Initial integrate queue with language service.

* Hook up the connected binding queue into al binding calls.

* Cleanup comments and remove dead code

* More missing comments

* Fix build break.  Reenable ReliabileConnection.

* Revert all changes to SqlConnectionFactory

* Resolve merge conflicts

* Cleanup some more of the timeouts and sync code

* Address code review feedback

* Address more code review feedback

src/Microsoft.SqlTools.ServiceLayer/Workspace/Contracts/ScriptFile.cs

@@ -36,8 +36,9 @@ namespace Microsoft.SqlTools.ServiceLayer.Workspace.Contracts
         /// <summary>
         /// Gets or sets the path which the editor client uses to identify this file.
         /// Setter for testing purposes only
+        /// virtual to allow mocking.
         /// </summary>
-        public string ClientFilePath { get; internal set; }
+        public virtual string ClientFilePath { get; internal set; }
 
         /// <summary>
         /// Gets or sets a boolean that determines whether