CPU Utilization not working in en_US locale

[sberl]

I think this is the same problem as issue #2, which was closed without being resolved.
The problem is the locale dependent presentation of the time of day. In the USA, the time is shown as a 12 hour time with a separate column for AM and PM, while other locales use a 24 hour clock.
This shifted all the columns and messed up the parsing.
By specifying the environment variable as part of the command, the time presentation will be consistent across all systems.
In addition, the sudo is not required for execution of the mpstat command. It just slows things down, so I removed it.

[RichFind]

This fixes the problem I was having in the US.
Can we get this merged?