NIFI-13976: Adding endpoints to support copying and pasting flow cont…

[mcgilman]

…ents.

• Including the revision for the current Process Group in the flow response.
• Introduce a method propose built for adding new versioned components to an existing Process Group.
• Updating the paste response payload to only include the entities for the components that were just added.
• Always generating new IDs when copying components.
• Creating an ID for the copy action.
• Code clean up.
• Mapping IDs on paste to ensure connections are created correctly.
• Authorizing any components whose instance IDs are specified.
• Copying any sensitive properties from copied instances when pasting.
• Fixing mapping of copy response to ensure that nested Controller Services can be referenced.
• Including external Controller Services in copy response to they can be resolved on paste.
• Excluding unreferenced services from copy response.
• Including property descriptors to allow external services to resolve when pasting.
• Including Parameters and Parameter Providers in copy response.
• Fixing issue returning unreferenced services in the current process group.
• Reverting changes building up external service references.
• Only including external services that are references by the copy selection.
• Adding some additional test coverage.
• Adding consideration for the current ids in the paste id mapping.
• Adding an endpoint response merger for the paste endpoint.
• Including version control information in copy response.
• Being more lenient when pasting unknown registry clients.
• Ensuring groups IDs are mapped correctly when and when not versioned.
• Including registry client id in vci of versioned process groups.
• Updating copy/paste logic in existing system tests to leverage new endpoints.
• Restoring originally proposed port name if possible.
• Allow ports to be pasted into the root group.
• Fixing authorization issue when pasting a flow containing Parameter Providers.
• Fixing issue when authorizing exporting a Flow that contains a Process Group bound to a Parameter Context.
• Introducing some Copy/Paste system tests.
• Adding system tests for verify various copy paste functionality.
• Fix checkstyle issue.
• Fixing checkstyle issues.
• Ensuring appropriate access around Parameter Providers following resolution based on locally available Parameter Providers.
• Ensuring user has access to controller services directly referenced.
• Fixing NPE in log message of Parameter Context.
• Adding more copy/paste system tests.
• Moving copy/paste version tests into the CopyPasteIT.
• Fixing unit test mocking.
• Include service authorization based on versioned component id since it may resolve during synchronization.
• Skipping properties with no values when resolving service identifiers.

This PR can be tested with the corresponding front end changes available in this PR [1].

[1] #9536

[exceptionfactory]

Thanks for the detailed work on the support for copy-paste @mcgilman. I ran through an initial code review and noted a few minor questions and comments.