2.12 release: branch voltha-2.12 created from tag v2.12.0

1. 836a1fd [VOL-4396] OMCI lib update to be incorporated into ONU adapter, make use of relaxed decoding by mpagenko · 2 years, 8 months ago[Renamed (90%) from vendor/github.com/opencord/omci-lib-go/mebase.go]
2. 6afb56a VOL-4028: Support ANI-G test message at openonu-go adapter by Girish Gowdra · 3 years, 2 months ago
3. d80007b VOL-3978 - update to go 1.16.3 by David K. Bainbridge · 3 years, 3 months ago
4. bf67a09 VOL-3052 Onu Software upgrade addendum: omci-lib-go update + download robustness by mpagenko · 3 years, 4 months ago
5. fa07499 WIP [VOL-2811] - Incorporate preliminary onu-adapter-go code into opencord repo by Holger Hildebrandt · 4 years, 3 months ago