add test for get_config_project_list()
add test for get_config_project_list()

Thanks to the blogpost of Fotis Gimian @fgimian for inspiration on
mocking functions :
http://fgimian.github.io/blog/2014/04/10/using-the-python-mock-library-to-fake-regular-functions-during-tests/

buildtimetrend/service,buildtimetrend/service,buildtimetrend/service