Ported critest to Windows

[SaswatB]

Port of all applicable tests to Windows.
Supports Windows containers and Linux containers on Windows.

Signed-off-by: Saswat Bhattacharya sabhatta@microsoft.com

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[SaswatB]

Check CLA

[feiskyer]

@SaswatB Thanks for the great work. I'm concerned it's hard to maintain with current implementation, as it defines many different consts for Windows/Linux in same file. For such cases, it's preferred to define them in different platform-specific files and keep using same variable name.

[feiskyer]

Thanks of cleaning up the consts. Could you rebase the PR, squash the commits and sign CLA?

[feiskyer]

/check-cla

[SaswatB]

/check-cla

[feiskyer]

@SaswatB Travis is still failing. Could you fix the validation errors?

[feiskyer]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: feiskyer, SaswatB

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