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/services/notebook/common/sessionManager.ts

@@ -7,6 +7,7 @@
 import { nb } from 'sqlops';
 import { localize } from 'vs/nls';
 import { FutureInternal } from 'sql/parts/notebook/models/modelInterfaces';
+import { ConnectionProfile } from 'sql/platform/connection/common/connectionProfile';
 
 export const noKernel: string = localize('noKernel', 'No Kernel');
 const runNotebookDisabled = localize('runNotebookDisabled', 'Cannot run cells as no kernel has been configured');
@@ -91,6 +92,15 @@ export class EmptySession implements nb.ISession {
 	changeKernel(kernelInfo: nb.IKernelSpec): Thenable<nb.IKernel> {
 		return Promise.resolve(this.kernel);
 	}
+
+	// No kernel config necessary for empty session
+	configureKernel(kernelInfo: nb.IKernelSpec): Thenable<void> {
+		return Promise.resolve();
+	}
+
+	configureConnection(connection: ConnectionProfile): Thenable<void> {
+		return Promise.resolve();
+	}
 }
 
 class EmptyKernel implements nb.IKernel {