Alanren/integration test (#3657)

* add an extension for integration tests

* setup ads before running test

* test setup

* test cases

* bash script

* shorter temp folder name

* code cleanup

* add commented out original code

* fix test error

* test result path

* rename results file

* change file path

* report smoke test results

* test stablize

* test stablization and configurable test servers

* fix smoke test error

* connection provider

* simplify the integration test script

* add comment

* fix tslint error

* address PR comments

* add temp log to check whether the environment variable is already set

* remove temp log

* move api definition to testapi typing file

* exclude integration tests extension

* address comments

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

@@ -47,4 +47,8 @@ export class ExtHostConnectionManagement extends ExtHostConnectionManagementShap
 	public $getUriForConnection(connectionId: string): Thenable<string> {
 		return this._proxy.$getUriForConnection(connectionId);
 	}
+
+	public $connect(connectionProfile: sqlops.IConnectionProfile): Thenable<sqlops.ConnectionResult> {
+		return this._proxy.$connect(connectionProfile);
+	}
 }