refactor provider interfaces

## Type of change
- [*] Bug Fix 
- [ ] Feature

**Please provide link to gitlab issue or ADR(Architecture Decision Record)**  

https://community.opengroup.org/osdu/platform/system/notification/-/issues/8

## Does this introduce a change in the core logic?
- [YES/NO] NO

## Does this introduce a change in the cloud provider implementation, if so which cloud?
- [ ] AWS 
- [ ] Azure
- [ ] GCP
- [ ] IBM

## Does this introduce a breaking change?
- [YES/NO] NO

## What is the current behavior?

## What is the new/expected behavior?

## Have you added/updated Unit Tests and Integration Tests?

## Any other useful information

mentioned in issue #8 (closed)

changed the description

added 1 commit

• 7eb561eb - comments

Compare with previous version

resolved all threads

mentioned in merge request !10 (merged)

mentioned in issue home#43 (closed)

added 4 commits

• 7eb561eb...f962c2ad - 2 commits from branch master
• 7241dd2a - Merge branch 'master' into provider-interfaces
• 0a3f122a - merge from master

Compare with previous version

resolved all threads

approved this merge request

merged

mentioned in commit 62e7a156

mentioned in issue register#12 (closed)

added Common Code MRRefactor labels

changed milestone to %M1 - Release 0.1