Currently as we add more tests every test does some similar functions so they are being copy-pasted between tests. It would be good to add some "include" directory with common functions which can then be just sourced, like:

• mycnf_get_path

• mycnf_add_option

• mycnf_remove_option

• check_server_running

• check_server_stopped

• wait_server_start

• wait_server_stop

• install_plugin

• uninstall_plugin