Adds STI to Query model. Issue queries are now IssueQuery instances.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10964 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/lib/redmine/helpers/gantt_test.rb

@@ -50,7 +50,7 @@ class Redmine::Helpers::GanttHelperTest < ActionView::TestCase
     @project = project
     @gantt = Redmine::Helpers::Gantt.new(options)
     @gantt.project = @project
-    @gantt.query = Query.create!(:project => @project, :name => 'Gantt')
+    @gantt.query = IssueQuery.create!(:project => @project, :name => 'Gantt')
     @gantt.view = self
     @gantt.instance_variable_set('@date_from', options[:date_from] || (today - 14))
     @gantt.instance_variable_set('@date_to', options[:date_to] || (today + 14))