use fixed time in workload_spec
complement missing test
Fix bug that can't replace stop button
Merge pull request #170 from kmiyake/iss-169_fix_bug_for_timecard_func

Fix bug that can't replace stop button
Merge pull request #166 from shirakia/iss-165_fail_tests_in_other_countries

Iss 165 fail tests in other countries
Fix bug that infinitely increase element
Merge pull request #174 from kmiyake/iss-171_fix_bug_increase_element

Fix bug that infinitely increase element