[c-nsp] Cisco IOS XR event manager run

[Lukas Tribus]

> Don't know about XR but in plain IOS a policy can only be registered for
> one trigger type, and running manually is a trigger type.

You can however combine/correlate 2 or more triggers, which permits
executing the script manually and automated at the same time, without
modifying the start trigger each time ...

event manager applet EVERY_FIVE_MINUTES_PLUS_MANUALLY
 event tag cron timer cron cron-entry  "*/5 * * * *"
 event tag none none
 trigger
  correlate event cron or event none