Add a constraint on "shoulda-matchers" version (#17828).

This helps bundler find its dependencies in case shoulda-matchers v1.4.2 is
already installed. In such a case bundler breaks while it shouldn't.


git-svn-id: http://svn.redmine.org/redmine/trunk@13411 e93f8b46-1217-0410-a6f0-8f06a7374b81

Author: jbbarth

Gemfile

@@ -86,6 +86,7 @@ end
 
 group :test do
   gem "shoulda", "~> 3.3.2"
+  gem "shoulda-matchers", "1.4.1"
   gem "mocha", "~> 1.0.0", :require => 'mocha/api'
   if RUBY_VERSION >= '1.9.3'
     gem "capybara", "~> 2.1.0"