Pipeline is not always added to the default collection

[yakanechi]

What happened:
If pipelines are created at the same time, only one of them may be added.
The cause is probably the following locations.

screwdriver/plugins/pipelines/create.js

Lines 94 to 102 in 02a8dfe

	// Check if the pipeline exists in the default collection
	// to prevent the situation where a pipeline is deleted and then created right away with the same id
	if (!defaultCollection.pipelineIds.includes(pipeline.id)) {
	Object.assign(defaultCollection, {
	pipelineIds: [...defaultCollection.pipelineIds, pipeline.id]
	});
	await defaultCollection.update();
	}

When pipelines are created at the same time, only the pipeline ID of the UPDATE side that completes later is added because neither has been added to the default collection yet.

What you expected to happen:
All pipelines are added to the default collection even if they are created at the same time

How to reproduce it:
Create pipelines simultaneously