Busser and transport enhancements#18

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muratiakos wants to merge 9 commits intoafiune:Transportfrom

muratiakos:Transport

Commits on Feb 4, 2015

Fixing Exit code issue for remote MD5 hash calculation
muratiakos
committed

Commits on Feb 10, 2015

Created a separated file-transfer for busser to support WinRM for larger files, instead of using raw echo commands.
muratiakos
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Set-ExecutionPolicy to enable Pester on Server 2008
muratiakos
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Adds Busser cleanup for Windows
muratiakos
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Commits on Feb 12, 2015

Commits on Feb 13, 2015

Adds exit condition if nothing to upload, for supporting dummy provisions
muratiakos
committed

Commits on Feb 16, 2015

Adds driver ssh_key to transport configuration
muratiakos
committed

Commits on Feb 19, 2015

Fixes new busser file-transfer for SSH
muratiakos
committed