Hey Bharat Goyal,
TabJolt is available as-is and not supported by Tableau. However, we expect you'll have questions. Please post your questions on the Tableau Server Administration forum with "TabJolt" as the subject.
We're hopeful that many of you will start to build a community around this tool and share what you learn.
Here are some resources for you:
Moved this to the Server admin forum because of it being about Tabjolt: A tool very specific to Tableau Server and where Tabjolt was introduced. Only the TJ dev team would be able to supply answers.
You could also look at the installation guide. There is a section to talk about how to customize the test plan. Thanks!