Removing previous unit tests folder with duplicate identity config file

Change-Id: Ic8f84dd113787f58214ee29d768e1bfe970625cb
Adding unit tests for flavor lists.

Change-Id: Ic8ed3ac8da657dfd9168b6976d96916f10dc8437
    1. Fix flavor list unit test python 3.3 compatibility issue.
    2. tox.ini: setup pep8 ignore and exclude list.
    3. add pylintrc to customize pylint

Change-Id: I43a1e0c3243cc8c6b3aa1e1a7d43c837cc5fe7a8
Merge pull request #113 from ajiang38740/unittest_flavor_list

Unittest flavor list