* Fix legacy os extend support
Now compatible with oids that could have been used by older software:
extend .1.3.6.1.4.1.2021.7890.2 hardware
extend .1.3.6.1.4.1.2021.7890.3 manufacturer
extend .1.3.6.1.4.1.2021.7890.3 vendor
extend .1.3.6.1.4.1.2021.7890.4 serial
And correct the oids for VERY old exec options.
* Convert to SnmpQuery and convert some numeric oid to textual
* MIB-Dell-10892::chassisServiceTagName.1 is discovered already in ServerHardware trait, no need to double fetch
* OIDs were previously mixed up, fix data