Rails 4.0 upgrade

Fixed rspec error in log_entry_spec
-- changed :format to :export_format to resolve conflict with keyword format

Fixed rspec error in report_spec
--- changed 'build' to 'create'.  NOTE that rails 3 version has 'create'.  Was changed to 'build' by Josh in March... neither of us are sure why.  Changing back to 'create' fixes "NOT FOUND" error.