Add prefix `do_` to functions defined in init script of `td-agent` as same as script for Debian
Add prefix `do_` to functions defined in init script of `td-agent` as same as script for Debian

iantalarico/google-fluentd,iantalarico/google-fluentd,treasure-data/omnibus-td-agent,GoogleCloudPlatform/google-fluentd,GoogleCloudPlatform/google-fluentd,iantalarico/google-fluentd,treasure-data/omnibus-td-agent,treasure-data/omnibus-td-agent,GoogleCloudPlatform/google-fluentd