Improve the audit logs for printing token revocation details

[kavithasub]

Description: Enhancement for adding audit logs for token revocation

Suggested Labels: Type/Improvement

Affected Product Version: wso2is-km-5.3.0

OS, DB, other environment details and versions:

Steps to reproduce:

• Start IS-KM server, and create a SP
• Generate a token using password grant type
• Now revoke the token
• Check the audit log - it should print the revocation details something similar as below token generation details

  [2019-01-02 15:05:25,663]  INFO {AUDIT_LOG}-  Initiator : admin | Action : PostTokenIssue | Target : PasswordGrantAuditLogger | Data : { "AuthenticatedUser" : "admin","AuthenticatedUserStoreDomain" : "PRIMARY","AuthenticatedUserTenantDomain" : "carbon.super","ServiceProvider" : "testSP1","RequestType" : "oauth2","RelyingParty" : "5q7fNvd5JiBAVbPcEW7B5Ws_9PMa" } | Result : Success

[vihanga-liyanage]

Details related to the fixes are in https://github.com/wso2/product-is/issues/4295