Added a workaround for addressing not persisting on IOMs

Just to add a note that might help for reviewing.  This class is extending a default Puppet class https://github.com/puppetlabs/puppet/blob/master/lib/puppet/util/network_device/transport/ssh.rb

It has the setup for "expect" that we need for connecting to the IOM, so I'm able to leverage it here instead of rewriting a bunch of code.