Increase frequency of module status verification

[Morten Brekkevold]

The presence/absence of modules is verified by the ipdevpoll modules plugin, which is configured in the inventory job. The inventory job only runs every 6 hours, which means that any changes in the status of modules is checked only every 6 hours.

The modules plugins should easily be able to run every 5 minutes - it really only cares about the ENTITY-MIB::entPhysicalTable, and will use the ENTITY-MIB::entLastChangeTime TimeStamp to detect whether any changes have taken place in the ENTITY-MIB tables (making sure to avoid unnecessary large-scale table retrievals).

The same goes for the entities plugin, which was introduced in the 4.3 release candidate - it will verify the presence/absence of chassis in a stack using much of the same logic as modules.

[Morten Brekkevold (mbrekkevold)]

fix here: https://nav.uninett.no/hg/stable/rev/f3a9c6a9d1d1