SQL Kernel Improvements/Removing Spark Code from Core/Attach to Changes (#3790)

* Scenarios work besides loading saved kernel

* Fix compilation issue

* Save and load functional

* Fix loading kernesl issue when sql kernel is not enabled

* Fix language mapping to not be hardcoded any longer

* Remove unnecessary comment

* PR Comments vol. 1

* Code cleanup, use ConnectionProfile instead of IConnectionProfile when accessing serverName

* PR changes vol. 2

* One final comment for PR

* Fix linting issue

src/sql/workbench/api/node/extHostNotebookDocumentsAndEditors.ts

@@ -168,6 +168,7 @@ export class ExtHostNotebookDocumentsAndEditors implements ExtHostNotebookDocume
 			options.position = showOptions.viewColumn;
 			options.providerId = showOptions.providerId;
 			options.connectionId = showOptions.connectionId;
+			options.defaultKernel = showOptions.defaultKernel;
 		}
 		let id = await this._proxy.$tryShowNotebookDocument(uri, options);
 		let editor = this.getEditor(id);