Configure rspec to fail_fast
Update chefspec to newer version (> v4.1.1)

- requires chefspec later than v4.1.1 because we require the ability to test
  cookbook_file[qcc_2.3.tar.gz]; support for this was added in chefspec
  commit 88f9c18cc1b400913453203b359149d684bc527c
- hardcode /var/chefspec/cache as file_catch_path (example previously
  used file location in example name and file_path_cache is updated afterward)
- update r_project examples to use SoloRunner instead of deprecated Runner
Use ChefSpec::SoloRunner method

- replace all instances of deprecated ChefSpec::Runner method with
  ChefSpec::SoloRunner
Merge pull request #44 from jhx/issue_43_update_chefspec_v411

Update chefspec to latest version