IODeviceWeight, IOReadIOPSMax, .. do not work in systemd::manage_unit or systemd::dropin_file

[traylenator]

The current types for these parameters for service and slice:

Optional['IODeviceWeight']      => Array[Hash[Stdlib::Absolutepath, Integer[1,10000], 1, 1]],
Optional['IOReadBandwidthMax']  => Array[Hash[Stdlib::Absolutepath, Pattern['^(\d+(K|M|G|T)?)$'], 1, 1]],
Optional['IOWriteBandwidthMax'] => Array[Hash[Stdlib::Absolutepath, Pattern['^(\d+(K|M|G|T)?)$'], 1, 1]],
Optional['IOReadIOPSMax']       => Array[Hash[Stdlib::Absolutepath, Pattern['^(\d+(K|M|G|T)?)$'], 1, 1]],
Optional['IOWriteIOPSMax']      => Array[Hash[Stdlib::Absolutepath, Pattern['^(\d+(K|M|G|T)?)$'], 1, 1]],

Are incompatible with the template - templates/unit_file.epp.

This error was introduced in v6.0.0 with #367

[traylenator]

Either

• Fix template to cope with these types
• Change types to be more typical to what the template expects.
• Bit of both.