Subscription Rework and multiple version support

[rzwiefel]

Remaining to do/possible changes

• Check if these changes are 2.24/2.25 compatible and change any of the 2.26 nomenclature to 2.24+/2.25+ depending on which is supported.
• Update root readme with information about email-service and how to install the different versions (feature repo add, feature install)
• A complete runthrough of all registered methods on both a 2.19 and 2.26 instance to ensure no runtime issues were missed
• miscellaneous code cleanup (see comments i left on pr)

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Closes #24

Overview

• Subscriptions are no longer coupled with the ddf.catalog/query response (Did not match what the catalog framework does)
  • Two new Subscriptions methods: One for checking if you are subscribed to the supplied ids, and one for fetching all your current subscriptions
  • ⚠️ This will break existing users of query method relying on subscriptions (working with downstream consumers to fix)
• Added support for multiple versions of DDF: 2.19, 2.26+
  • Abstracted version incompatibilities away behind a service and support into two implementations of that service that can be installed with the corresponding versions via feature install.
• New feature module with Feature file containing the two previously mentioned features: jsonrpc-2.19 and jsonrpc-2.26

Bundle changes

• ddf-rpc-api
• Custom Import package utilizing version ranges that will work with both 2.19 and 2.26 (mostly ddf packages, but also shiro and geotools

New Bundles:

• email-service
  • Contains the EmailResolver interface and exports it
• 2.19-email-impl & 2.26-email-impl
  • Contains implementations for EmailResolver for their respective versions

Blueprint changes

• ddf-rpc-api
  • No longer uses SubjectOperations(Service)/SecurityUtils(Static class methods) -- Now uses email-service
• 2.19-email-impl/2.26-email-impl
  • Registers the EmailResovler implementation as a service

Structural changes

• No longer a single module, so we now have a few levels of modules
  

[rzwiefel]

remove

[rzwiefel]

See if this is removeable or if the transitive dependency powers that be require us specify this

[rzwiefel]

Tested all methods against 2.19 and master (currently 2.27-SNAPSHOT) successfully

[rzwiefel]

Verified that this works with ddf 2.23.2 as well

[rzwiefel]

CI build passed ✅ 🎉