spec: bump rspec

closer to 3.0, which we probably don't want to go to until
we can drop rspec 1 (rails 2)

Change-Id: I8affc4882bfc927a6d3b9bcc9c43fe5ab92cd3b7
Reviewed-on: https://gerrit.instructure.com/37326
Reviewed-by: Jon Jensen <jon@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>

Gemfile.d/test.rb

@@ -23,8 +23,8 @@ group :test do
     gem 'rspec-rails', '1.3.4'
     gem 'test-unit', '1.2.3'
   else
-    gem 'rspec', '2.14.1'
-    gem 'rspec-rails', '2.14.1'
+    gem 'rspec', '2.99.0'
+    gem 'rspec-rails', '2.99.0'
     gem 'once-ler', '0.0.11'
   end
   gem 'sequel', '4.5.0', :require => false