Sort the queue list for in-memory repository

[itchyny]

This PR sorts the queue list of FindAll() for in-memory repository. There is already tests for the name ordering, which randomly fail.

fireworq/repository/factory/repository_test.go

Lines 119 to 134 in 1cdc8d3

	{
	qs, err := repo.Queue.FindAll()
	if err != nil {
	t.Error(err)
	}
	if len(qs) != 2 {
	t.Error("There should be defined queues")
	}
	if qs[0].Name != "repo_queue_test_queue_2" {
	t.Error("Defined queues can be retrieved in name order")
	}
	if qs[1].Name != "repo_queue_test_queue_3" {
	t.Error("Defined queues can be retrieved in name order")
	}
	}

[tarao]

@itchyny LGTM

[itchyny]

Thank you.