Provider Domain - Switching from Hibernate Mappings to Annotations

, I have raised a PR here . Please share your thoughts. Thanks

I reopen this issue, this helps to make our code base more consistence and this is a great good-first-issue.

Automatic Closure: No material updates in >1yr

Automatically closing this ticket as per [our quarterly Graveyard process](https://wiki.openmrs.org/x/RAvDDw).
If anyone becomes aware of a reason this ticket should be brought back to life, or if you have questions or concerns about closing this issue, please simply:

1. Re-open the ticket
2. Remove any “Graveyard” label(s)
3. Add a comment explaining why this ticket is still important or should be addressed. If there is a particular site or organization counting on this work please also mention that.

Why we close issues that haven't been updated in >1yr: Regular "graveyarding" helps us keep our Jira tidy, and helps prevent critical issues being missed due to too much noise.

This is an automated message: This issue has not been updated in over 1 year, and so has been labelled 'GraveyardCANDIDATE', and will be automatically closed in 1 month on January 24.
If you would like to keep this ticket open: Please simply remove 'GraveyardCANDIDATE' label. And, ideally, please also comment why this is still an issue you'd like to see addressed.
Thank you!!

Link to PR: https://github.com/openmrs/openmrs-core/pull/3335