specinfra 0.5.0 has made some changes that break run_command for us,
get the ret from CommandResult.new now.
Merge pull request #15 from apenney/fix-serverspec

specinfra 0.5.0 has made some changes that break run_command for us,
Update argument passing for RS_DESTROY
Merge pull request #16 from hunner/preserve_hosts

Update argument passing for RS_DESTROY
Merge pull request #17 from anodelman/make-gem

create beaker-rspec 2.1.0 gem
Patch RS_DESTROY behavior

QA-723's implementation moved the logic for `@options[:preserve_hosts]`
out of the `Beaker::NetworkManager#cleanup` method to
`Beaker::CLI#execute!` and beaker-rspec doesn't use the CLI, so the
logic would have to be duplicated here, or beaker would need a patch to
move it back.

It doesn't really make sense for the cleanup method to conditionally
cleanup, and it doesn't make sense for beaker to be inspecting the
success state of RSpec, so beaker-rspec can be changed to work.
Merge pull request #18 from hunner/fix_destroy

Patch RS_DESTROY behavior
Merge pull request #20 from anodelman/make-gem

create beaker-rspec 2.1.1 gem
normalize env var handling

- have all env vars start with BEAKER_
- process all env vars in one hash
- set all default values in one hash
Merge pull request #24 from anodelman/beaker-env

normalize env var handling
Merge pull request #25 from anodelman/make-gem

create beaker-rspec 2.2.0 gem
update configuration/validation steps for beaker 1.8.1+ gem

- beaker has changed its configuration/validation steps and beaker-rspec
  will need to be updated as well
- these changes will need to be run with beaker 1.8.1+
Merge pull request #27 from anodelman/update-configuration-steps

update configuration/validation steps for beaker 1.8.1+ gem
create beaker-rspec 2.2.1 gem