Incorrect check for available core count in powervm_lpar_instance

[cunlifs]

Hi, when using powervm_lpar_instance modules to build a new LPAR profile, the proc_units value is incorrectly checked.

For example on a frame with 1.4 cores available and proc_units: 0.5 and proc: 2 requested in the module, it fails saying please select 1 or less for proc value. If you lower to 1 virtual proc it works.

[AnilVijayan]

Fixed with #36