Adding mailer configuration
Renaming ActionTimings -> ActionPlans inside tutorial samples
Adding mail_async action
Fix test default config mailer
Fixup mailer
Merge branch 'master' of https://github.com/cgrates/cgrates
Merge branch 'master' of https://github.com/cgrates/cgrates
Merge branch 'master' of https://github.com/cgrates/cgrates
Default client-server over internal connections, small fixup order of service start
Fix local tests