add missing fixtures to TimeEntryReportsControllerTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012880
Rails4: replace deprecated Relation#sum with finder options at lib/redmine/helpers/time_report.rb

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012881