japi: update docs
japi: update docs

also fix a bug testing for empty $APIKEY and $CRUMB

vmoravec/automation,aspiers/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,vmoravec/automation,SUSE-Cloud/automation,vmoravec/automation,aspiers/automation,gosipyan/automation,vmoravec/automation,gosipyan/automation,SUSE-Cloud/automation