fix travis(?)

test/test_helper.rb

@@ -1,4 +1,4 @@
-require File.expand_path(File.dirname(__FILE__) + '/../../../test/test_helper')
+require Rails.root / 'test' / 'test_helper'
 
 class ActiveSupport::TestCase
 

travis.sh

@@ -35,7 +35,7 @@ then
   git checkout -b $REDMINE_GIT_TAG origin/$REDMINE_GIT_TAG
 fi
 
-# create a link to the backlogs plugin
+# create a link to the plugin
 ln -sf $PATH_TO_PLUGIN plugins/$NAME_OF_PLUGIN
 
 mv $TESTSPACE/database.yml.travis config/database.yml