Prashant Jaikumar

[CDAP-19328] Implement prepareRun, onRunFinish in WrappedSplitterTransform

1

Implementing `prepareRun`, `onRunFinish` enables these methods to be called in plugins that extend SplitterTransform. #### Testing Tested by implementing `prepareRun` in [NullFieldSplitter](https://github.com/cdapio/hydrator-plugins/blob/develop/transform-plugins/src/main/java/io/cdap/plugin/NullFieldSplitter.java) and verifying that it gets called.

Add APIs for tethering profile creation

1

- Add APIs that returns tethered peers, namespaces exported by a tethered peer. - Fail tether deletion if it's used by a compute profile.

[CDAP-19609] Create an access token generator tool

1

- Create a tool that starts an http server which serves access tokens - In the AuthenticationHandler, return INTERNAL Credentials if the user identity type is INTERNAL

Cherrypick #15519

Set twill version to 1.4.0

CDAP instance is ready when all services are up and running. The operator monitors service status by querying CDAP REST APIs and updates the status section. The control plane can...