add custom managements commands for init operations and generate demo data
add pytest ixture for test stdout and stderr of django custom commands
add to coverage omit, path to exclude files or dirs that starts with "demo"
move fixtures into confetst for only tests packages
add get_messages_of_ticket method to HelpdeskUser model
work in progress
fix type on test_change_ticket_have_messageinline_in_formset name
work in progress