feat: add serviceName option for oracle connections

[imnotjames]

Description of change

adds an explicit serviceName for connecting to oracle

fixes #8006

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run lint passes with this change
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits follow conventions explained in CONTRIBUTING.md

[pleerock]

Interesting, why it didn't execute CI tests 🤔

[imnotjames]

Interesting, why it didn't execute CI tests thinking

Because I have CircleCI set up in my local repo it does for the commit but not for the PR when the commit ends up in the branch before the PR has been opened.