Add 'serverspec' to Gemfile.

This commit refs #28.
Add serverspec initial configuration files.

This commit refs #28.
Add .rspec file to customize the rspec behaviour.

Add .rspec file in order to:

- Colorize the output texts
- verbose outputs

This commit refs #28.
Install ci_reporter gem to analyze the test results.

This commit refs #28.
Add base recipe tests.

This commit refs #28.
Merge branch 'id/28' into dev