(maint) Clean up the lsbmajdistrelease fact

This change changes the style and confinement of the lsbmajdistrelease
fact to match that of the lsbminordistrelease fact.
Fixup
Merge branch 'ghoneycutt-cleans_up_lsbmajdistrelease'

* ghoneycutt-cleans_up_lsbmajdistrelease:
  Fixup
  (maint) Clean up the lsbmajdistrelease fact

closes #425