[COOK-3829] Add option to ignore SSL certificate

This adds support for ignoring SSL certificates on the Jenkins master when setting up Jenkins nodes.  Set:

    node['jenkins']['node']['no_certificate_check'] = true

Currently jenkins-cli.jar and slave.jar are supported.  The `node['jenkins']['node']['no_certificate_check']` option is turned off by default.

https://tickets.opscode.com/browse/COOK-3829