TZ settign comparison in test

[leshkinski]

TimeZone comparison in the test function is not correct, because it's comparing the DSC setting vs what is returned by tzutil. The current setting may be correct, but still return an error.

Problem code:
https://github.com/rsWinAutomationSupport/rsInternationalSettings/blob/master/DSCResources/RS_rsTime/RS_rsTime.psm1#L128

Proposed solution:
Review how TZ is retrieved and ensure consistency with possible TZ settings ins DSC configuration