Azure impl

This PR contains entire Azure implementation of WKS Transformation service

Changes in this PR

All three interfaces are implemented

1. MappingStore
2. SubscriptionManager
3. UserCredential

Testing

Integration tests: Refactored the integration tests to wks-test-core

Following the same structure as in schema service for adding any provider specific utility

https://community.opengroup.org/osdu/platform/system/schema-service/-/tree/master/testing/schema-test-core

What might change in future:

Currently we are subscribing for single tenant (opendes)

This implementation will change in future where we subscriber for all tenants