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

1. ab350ba [VOL-4927] omci-lib-go: ONT-G ME alarms are not supported by Holger Hildebrandt · 1 year, 8 months ago v2.11.0 v2.8.1
2. 3ac49bd [VOL-4485] omci-lib-go: ME Attribute names should be exported by Holger Hildebrandt · 2 years, 7 months ago v2.2.0
3. 836a1fd [VOL-4396] OMCI lib update to be incorporated into ONU adapter, make use of relaxed decoding by mpagenko · 2 years, 10 months ago