Assume the scp target is a file instead of a directory. Assuming the scp
target is a file instead of a directory allows uploading files to a node
being provisioned with the ssh communciator using sftp and with the
winrm communicator. It is fully compatible with ansible; ansible
communicators only allow for files (never directories) to be uploaded
(when the copy module is used to upload a directory, ansible walks the
directory and uploads files one at a time).
Update documentation to explain how to provision a Windows image.
Extend tests that use ssh to communicate with the node to include single
files, recursive copies, and content-only recursive copies.
Add test to verify support for the winrm communicator.
Remove the err argument from adapter.scpExec, because it was unused.
Fixes#3911
Billie Cleek