Link JIRA issue tracker from Bitbucket navigation (BB-10334)

From a Bitbucket repository, there is no visible link to JIRA as the "Issue Tracker" for that repository – even when the integration is set up correctly and commit message links are hyperlinked correctly. From the corresponding JIRA project, there is no link to the Bitbucket repo (aside from the various commit links in specific issues and activity feeds).

You may ask why I care about this. If I am looking at a commit message in BitBucket and it has tags in it that link to specific issue(s) in JIRA, and I can get from JIRA to the relevant commits, merges, and branches in BitBucket, then why does a missing header matter?

use case: Joe is a developer and begins work on this project by cloning the repo. He discovers a bug and wants to make sure that the lead developer is aware of it. He goes to the overview page in BitBucket, but does not see an "issue tracker" link in the header where one would appear if the project were using BitBucket's internal issue tracker. Since he is new to this project, he has not viewed detailed commit messages from other developers that link back to specific issues in JIRA. He concludes that this project does not have an associated issue tracker so decides to abandon his interest in the project.

please see: https://confluence.atlassian.com/display/BITBUCKET/Set+up+a+Wiki+and+an+Issue+Tracker?focusedCommentId=585072784#comment-585072784

I have the same basic issue linking between the Bitbucket repo and the associated page in Confleunce.