Open dacfx deploy script instead of saving to file path (#822)

* open dacfx deploy script

* moving test db cleanups into finally blocks

src/Microsoft.SqlTools.ServiceLayer/DacFx/Contracts/GenerateDeployScriptRequest.cs

@@ -13,11 +13,6 @@ namespace Microsoft.SqlTools.ServiceLayer.DacFx.Contracts
     /// </summary>
     public class GenerateDeployScriptParams : DacFxParams
     {
-        /// <summary>
-        /// Gets or sets the filepath where to save the generated script
-        /// </summary>
-        public string ScriptFilePath { get; set; }
-
         /// <summary>
         /// Gets or sets whether a Deployment Report should be generated during deploy.
         /// </summary>