Introduce RackHD testing (Jenkins/TravisCI/Hound/Coverall/…) and FIT framework.

Goals:

(1)Understand RackHD all testing and their purpose

(2)Understand the FIT framework

(3)Understand the python API library that auto generated by RackHD.

(4)Understand how to write a test case.

(5)Understand how to run FIT test case.

Practice:

(1)Find a missing test case, then replenish it and submit it into official repository.

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