Use rake beaker for acceptance

Author: ofedoren

moduleroot/CONTRIBUTING.md.erb

@@ -218,18 +218,13 @@ and specifically the [section for running tests](https://github.com/mcanevet/rsp
 For more dependencies please see related information for picked variant.
 Additonal info can be found at [voxpupuli-acceptance](https://github.com/voxpupuli/voxpupuli-acceptance/#running-tests) which is used to run the tests.
 
-3. For first (or clean) runs, run:
-  - `bundle exec rake spec_clean && bundle exec rake spec_prep`
-
-This will make sure all needed modules are prepared to be used in a VM.
-
-4. Run the tests:
- - `BEAKER_HYPERVISOR=vagrant_libvirt bundle exec rspec`
+3. Run the tests:
+ - `BEAKER_HYPERVISOR=vagrant_libvirt bundle exec rake beaker`
    - Use `bundle exec rspec spec/acceptance/my_test.rb -e "test"` to run a specific test as you'd usually do with `rspec`.
 
  This will use `vagrant` and `libvirt` as the provider to create a VM and will run all tests there.
 
-5. You can additionally specify:
+4. You can additionally specify:
  - `BEAKER_PUPPET_DEBUG=yes` to make Puppet more verbose.
  - `BEAKER_destroy=no` to leave the machine for further inspection in case of an error.
    - Use `cd .vagrant/beaker_vagrant_files/beaker_centos8* && vagrant ssh` to SSH into VM.