tests: rename parametrized tests, use 'import' instead of 'in' etc.
tests: rename parametrized tests, use 'import' instead of 'in' etc.

RedHat-Eng-PGM/python-schedules-tools,RedHat-Eng-PGM/python-schedules-tools,RedHat-Eng-PGM/schedules-tools,RedHat-Eng-PGM/schedules-tools,RedHat-Eng-PGM/python-schedules-tools,RedHat-Eng-PGM/schedules-tools