test: add all indicators[0] tests
test: add IndicatorsLogic::retrive_data tests
remove ineffective "private" from lib
test: add some time entries tests
refactor: rename lib "check_ary_all_issues" local variable to "issue_max_start_date"
refactor: rename lib "check_ary_reported_time_week_year" local variable to "time_entry_max_date"
refactor: split defining real start and end date to method