* 12394 Add CPU and Mem for Teldat Devices

* add cpu and mem to teldat +mib files.

* minor adjustment.

* add classes to memory: system, shared, cache

* +snmpsim test files

* memory minor fix: class name 'cache' > 'cached'

* minor fix removing: telProdNpMonSistemMemTotal

* add json tests.

* small fix: get S/N from description

* Update teldat.json

Co-authored-by: Tony Murray <murraytony@gmail.com>