Fixed string value to correctly integrate with scala-ide-play2, see:
https://github.com/aldenml/scala-ide-play2/commit/c97147b673ee545a3631082ad0d16a6adc549189#L3R27
Merge pull request #963 from aldenml/scala-ide-play2-integration-fix

Fixed string value to correctly integrate with scala-ide-play2