Make run_common_test entry saner
Dynamically discover apps to run cover on
Drop ct/0,1 and ct_cover/0,1 entry points to run_common_test.erl
Rename ejabberd_configs to ejabberd_presets
Drop ct_config/1 entry point to run_common_test.erl
Rearrange run_common_test.erl contents
Fix preset sanitizer
Fix spec sanitizer
Fix args_to_opts