* [updategraph] add support to use preset config instead of default minigraph
* Fix variable case
* Remove default minigraph case
* Remove default minigraphs and add default_sku files
* Added new platform support DellEMC - Z92264f - 64x100
* Includes changes with Makefiles, sfputil, eeprom and default minigraph
* Led support for Z9264f platform
* Includes changes on default minigraph
* ipmitool implementation in pmon docker. platform_sensors script is inclued in pmon startup