Provide with a proper regex or any other solution to anonymize stream data from logs

[chaminda]

Description: Once user has used LogSink or when user send incorrect payload, the payload data would logged in the carbon.log. If that data has any PII data, user should be able to clean those by the forgetme tool.

Affected Product Version: wso2sp-4.1.0-RC1

OS, DB, other environment details and versions:
macOs, H2, jdk1.8

Steps to reproduce:

1. Run ReceiveHTTPInJsonFormatWithDefaultMapping sample from the editor.
2. send some valid and invalid events to logged the stream data.
3. run the forgetme tool providing a name appeared in the log.