Adds ability to use ipaddress instead of fqdn in replicaset

[kri5]

This PR adds the ability to use ip address by specifying an attribute [:mongodb][:use_ip_address] instead of the fqdn for replicaset creation.

[jamesonjlee]

wouldn't it be better if you just changed rs_member to the ipaddresses if the flag is set to true further above?

[kri5]

@jamesonjlee do you mean here https://github.com/kri5/chef-mongodb/blob/0565aca19b653350758f10277dbc7fd91d44753f/libraries/mongodb.rb#L73 ?