Ubuntu doesn't use ia32-libs from 14.04

[cbalfour]

Ubuntu from 14.04 doesn't use ia32-libs. Use libc6-i386, lib32stdc++6, lib32gcc1, lib32ncurses5, and lib32z1 instead.

Instead of listing each Ubuntu release by name apply this rule to releases >= 14.04.

[cbalfour]

I had to jump through quite a few hoops to get the tests to pass my >= comparison and I am not sure I like the inline template and string to integer conversion I had to do.

Puppet documentation says that comparing an integer and a float automatically converts/truncates the float to an integer which works fine for my purpose but I guess relying on such side effects is not good practice and the current approach is more explicit.