As a developer/dev ops I want to be able to send emails with the subject as the severity and not to have to remember to add a space to configuration to avoid an exception.
As per http://entlib.codeplex.com/discussions/543985
between EntLib 5 and EntLib 6 subjectLineStarter and subjectLineEnder were made mandatory. Remove the validation (revert to EntLib
5 behavior) to allow the starter and ender to be left off (and just have the email subject be the severity).