[JENKINS-16356] Show seed job and template job info in the generated job

Covers JENKINS-16356 and JENKINS-16357.

Sample result:
![image](https://cloud.githubusercontent.com/assets/1336981/5404267/22711652-818d-11e4-815a-b2f4a4aa0e0c.png)

Was trying to be consistent with SeedReference again where getTemplateName() was never used. I believe that consistency == maintainability. Will review my changes again to make it slimmer if it's too questionable!