RackTables moved the init scripts
Revert "Added ubuntu to supported list"

This reverts commit 4eeaee586a641c4eeb29e124f890f17f133b94c1.
Merge branch 'next' of http://github.com/MattMencel/racktables into next
Revert "Revert "Added ubuntu to supported list""

This reverts commit e7a269c4789ba5853336c87be8741b13ce84e50f.