[HK] Migrate Nagios config to dedicated controller

Also create reference point for INEX working config to compare to future changes.
[HK] s/inex/ixp
[IM] Nagios config more dynamic
[DB] Add two new columns to vendor table

- shortname for a one word version of the vendor name
- nagios name to be used for referecning vendor specific check scripts
[DB] Update fixtures to reflect changes to vendor table
[IM] Update Nagios switch config generator with changes to vendor table
Small tweak for INEX
Changelog and version bump
Merge branch 'nf-nagios'