Implement changes to enable basic authentication for winrm by using --basic-auth CLI option.

PBI Ref: https://tickets.corp.opscode.com/browse/OC-10743?focusedCommentId=21775&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-21775

Added --basic-auth cli option to enable basic authentication for winrm. Added rspec tests.
@kaustubh-d  Please review it. Thanks.