[Feature] Set Connection config in Server and Baremetal

[ddymko]

Is your feature request related to a problem? Please describe. Relating to #98

Describe the solution you'd like Have terraform set your default connection information for server + baremetal. This will omit users having to define the their connection blocks like so:

   connection {
        type     = "ssh"
        host     = "ip"
        user     = "root"
        password = "password"
   }