fixes #17354 - test and improve idempotency of OS fact parser

refs #16899 - update help button on environments index

fixes #17335 - parse Solaris update as minor version

Also fixes idempotency of OSes with only a major version (as Solaris
was prior to this change), where `minor` was nil instead of "", causing
the OS to be recreated with a validation error.

Fixes #16619 - Set EC2 VPC instance private IP from primary NIC

fixes #17340 - assign IPv6 address to Rackspace CR hosts

Fixes #17334 - change password strength messages to imply warning

Fixes #17332 - Test email error renders properly in users

Fixes #17238 - Validates lookup value match exists in key path

fixes #16798 - move scoped_search definitions to STI subclasses

scoped_search doesn't support class inheritance with STI, so registering
definitions on the subclass fixes various issues. This fixes an issue
where scoped_search on CommonParameter calls Parameter.all and is...

Fixes #17200 - Add option datacenter to compute resource