versions: display link to jira Version after successful creation.

[bblancha]

In many workflows, the next step after creating a new Jira Version/Release is to add links to that release in documentation or comms.
Right now after collapsing a version, users need to go back into jira to get the link to the new release.
It would let them skip a step if Octobot showed the link directly on the Success page.

[bblancha]

fixed in #380