This JIRA is to define commands for Hadoop token. The scope of this task is highlighted as following:
• Token init: authenticate and request an identity token, then persist the token in token cache for later reuse.
• Token display: show the existing token with its info and attributes in the token cache.
• Token revoke: revoke a token so that the token will no longer be valid and cannot be used later.
• Token renew: extend the lifecycle of a token before it’s expired.