Issue 24 - Method to add multiple EventsOfInterest to the model

[amol-anand]

Description

Need this for someone who wants to register multiple combinations of Provider ID and Event Code to one Journal/Webhook.

Related Issue

https://github.com/adobe/aio-lib-java/issues/24

Motivation and Context

Need this for someone who wants to register multiple combinations of Provider ID and Event Code to one Journal/Webhook.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [X] I have signed the Adobe Open Source CLA.
• [X] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [X] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.

[amol-anand]

@francoisledroff please review and merge. need a way to add multiple combos of ProviderId and EventCode while registering a new journal to listen to events.

[amol-anand]

@francoisledroff updated. please review