fix: update tests around groups resource

[SiasMey]

Description

• refactor: remove unused interface from test
• test: refactor group resource tests
• test: refactor group resource tests some more
• test: slim down extra steps in groups resource tests
• test: rename test
• chore: update recipe to minimal test verbosity
• chore: minimize verbosity on test-client
• test: check expected values in plan for groups
• test: ensure group create plans a create on group
• test: ensure group with root parent plans parent_id
• test: ensure planed values for groups update
• test: ensure group without parent changes as expected
• fix: remove unused code

Related Issue(s)

• https://jira.arubanetworks.com/browse/UXI-9657

[1riatsila1]

Thank you for this :D This is great!