load_module <package>

Check if already loaded package and preload else

return : 0 - fail load class
1 - suss loaded
-1 - already loaded

_parse_str_to_hash <str>

convert string like:

    config=/tmp/tests.ini;host=test.local

to hash:

    {
      config=>'/tmp/tests.ini',
      host=>'test.local'
    }

get_classes <hash with defaults>

Get classes by check ENV variables

    get_classes( wdEngine=> $def_eng_class)

return ref to hash