`JiraIssue#getOtherUpdateContext` might use wrong update and transition

[Marcono1234]

The Bug

Not completely sure, but Mappers.kt JiraIssue#getOtherUpdateContext might use the wrong update and transition objects:

arisa-kt/src/main/kotlin/io/github/mojira/arisa/infrastructure/jira/Mappers.kt

Lines 322 to 334 in e6c0902

	private fun JiraIssue.getOtherUpdateContext(
	jiraClient: JiraClient,
	key: String
	): Lazy<IssueUpdateContext> =
	lazy {
	IssueUpdateContextCache.get(key) ?: IssueUpdateContext(
	jiraClient,
	jiraClient.getIssue(key),
	update(),
	transition(),
	transition()
	).also { IssueUpdateContextCache.add(key, it) }
	}

Notice how the issue it uses for the IssueUpdateContext is jiraClient.getIssue(key), but update() and transition() are from the (different) issue on which the extension function was invoked.

Expected behavior

update() and transition() should be called on the issue obtained from key?

Might also be good to check whether this can be refactored to reuse JiraIssue.getUpdateContext() (or add a common function for both) to prevent code duplication.