[qa][tempest] Update language in tempest code base

Hello,

I would like to start a discussion regarding the topic. At this moment in time we have an opportunity to be a more open and inclusive project by eliminating outdated naming conventions from tempest codebase, such as blacklist, whitelist. We should take the opportunity and do our best to replace outdated terms with their more inclusive alternatives. As you can see in [1] the TripleO project is already working on this initiative, and I would like to work on this as well on the tempest side.

Any thoughts? Shall I start with a sepc, adding deprecation warnings?

[1] https://review.opendev.org/#/c/740013/1/specs/victoria/renaming_rules.rst

Kind regards,