Merge pull request #21 from anodelman/beaker-rspec

Revert "Merge pull request #17 from anodelman/beaker-rspec"
Use @options[:timeout] instead of wait
Merge pull request #23 from anodelman/vagrant-file

fix for changed option name (:config to :hosts_file)
Merge pull request #24 from justinstoller/bug/master/QE311-undefined_wait

(QE-311) Bring just Scott's fix in (closes #20)
(QE-245)  Execution results should be available inside a block

Moving accessors out of test_case and into the dsl so that beaker-rspec
will be able to access them
spec tests for stdout/stderr/exit_code values after calling on