Fix JENKINS-20692

Added %a and %d to the pathFormat formatting options.

- %a will display the getName of the EditType
- %d will display the getDescription of the EditType

If getAffectedFiles is not implemented by the SCM, then "Unknown" will be put displayed for each %a anf %d
Merge branch 'master' of https://github.com/jenkinsci/email-ext-plugin