Beaker tests for vhost and policy

Adds a beaker tests for rabbitmq_policy and tests vhost while its
there. Also removes the saucy nodeset because saucy is super EOL.
Also removes some errant whitespace I found.
Improve rabbitmq type acceptance tests

This patch adds checks for idempotency and improves the shell command
syntax to contain one test at a time and use rspec tools to check
output and exit codes.
Merge pull request #2 from cmurphy/fix_266

Improve rabbitmq type acceptance tests
Merge pull request #266 from nibalizer/beaker_vhost

Beaker tests for vhost and policy