Powershell driver and deviceShifu request improvements

[tomqin93]

What this PR does / why we need it: This PR adds Powershell driver and other fixes and improvements to deviceShifu

Will this PR make the community happier? Yes

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

Release note:

- Adds Powershell driver
- Change HTTP request to context instead of fixed timeout

[seanli33056]

LGTM now need some rebase

[tomqin93]

Need to merge this in, will do an update soon

[tomqin93]

reopened in https://github.com/Edgenesis/shifu/pull/255