Add a report of software upgrade logs

[lunkwill42]

Is your feature request related to a problem? Please describe.

Now that #2313 is merged, NAV has the ability to provide a log of running software upgrades. However, it's not necessarily easy to get this kind of report out of the Device History tool.

Describe the solution you'd like

I suggest that a custom SQL report for software upgrade events could be added to the report system. It should simply list, in descending chronological order (based on the alerthist table):

• Date/time of alerthist entry
• IP device sysname (if applicable, left join)
• Sub-device id/name (it isn't necessarily clear how to figure out from the alert or old data whether the sub-device is a module, fan, PSU or something else)
• Sub-device serial number
• Old software revision
• New software revision

Describe alternatives you've considered

Just search for deviceSwUpgrade events in the Device History tool