fixes #14663 - support IPv6 DNS orchestration

fixes #14642 - support AAAA and PTR-Records in dns lib

Refs #3809 - Turning on some rubocop cops

fixes #14661 - support IPv6 subnets

fixes #14638 - Refactor Subnet into STI to allow different subnet types

Fixes #13725 - DHCP MAC conflicts are reported

Refs #12911 - Fixing colon method calls

fixes #12893 - ensure constants are set only once

the root cause is probably the same file is loaded multiple times.

Fixes #11709 - better error for DNS conflict timeouts

Refs #3809 - Remove semicolon cop