add transaction id to payment details

[PILLOWPET]

Q	A
Branch?	1.3 (security fixes), 1.4 (bug fixes, improvements), master (new features)
Bug fix?	no
New feature?	yes
Related tickets	mentioned in #251

[Zales0123]

The base of this pull-request was changed, you need fetch and reset your local branch
if you want to add new commits to this pull request. Reset before you pull, else commits
may become messed-up.

Unless you added new commits (to this branch) locally that you did not push yet,
execute git fetch origin && git reset "add-transaction-id-to-payment-details" to update your local branch.

Feel free to ask for assistance when you get stuck 👍

[Zales0123]

Hello @PILLOWPET 🖖 I've allowed myself to rebase it and add a basic spec for the new functionality (there was no spec for the class at all 😱 definitely needs to be fixed). I've also added a check if the gathered value is set, to prevent from potential failures.

Thank you for your contribution! 🚀

[Zales0123]

Thanks, Hadrien! 🎉