Force to RSpec 2.14 as suite is not compatible with 3.x

Some be_true which should be turned into be_truthy
Some have matchers that were removed, which there is a lib that will provide them
Blow up immediately when something is wrong

Specifically:
  running w/o Bundler will load an incompatible version of RSpec
  running from not-root will mess up all these relative paths
  repositories that don't override inspect can cause suite to hang when printing errors