Peg version of rspec in gemspec
Peg version of rspec in gemspec

The test suite fails under rspec 3. To prevent others from running into
this problem, we can pessimistically peg the version to the 2.14.x line.
Note that the test suite passes on 2.99.x, but gives a ton of
deprecation warnings.

wulczer/centurion,javimb/centurion,newrelic/centurion,askl56/centurion,OpenSourceProjects/centurion,luigisbox/centurion,nvaller/centurion