Cleanup test exemplars and fix subsequent @#generate@ calls generating same values (#7613).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@7458 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/exemplars/changeset_exemplar.rb

@@ -1,14 +1,8 @@
 class Changeset < ActiveRecord::Base
-  generator_for :revision, :method => :next_revision
+  generator_for :revision, :start => '1'
   generator_for :committed_on => Date.today
   generator_for :repository, :method => :generate_repository
 
-  def self.next_revision
-    @last_revision ||= '1'
-    @last_revision.succ!
-    @last_revision
-  end
-
   def self.generate_repository
     Repository::Subversion.generate!
   end