Convert topologies from GNS3 2.0.0 alpha to 2.0.0 final.

    Changes:
     * No more serial console
     * No more option for VMware / VirtualBox remote console (always use telnet)

def _convert_2_0_0_alpha(topo, topo_path):
    """
    Convert topologies from GNS3 2.0.0 alpha to 2.0.0 final.

    Changes:
     * No more serial console
     * No more option for VMware / VirtualBox remote console (always use telnet)
    """
    topo["revision"] = 6
    for node in topo.get("topology", {}).get("nodes", []):
        if node.get("console_type") == "serial":
            node["console_type"] = "telnet"
        if node["node_type"] in ("vmware", "virtualbox"):
            prop = node.get("properties")
            if "enable_remote_console" in prop:
                del prop["enable_remote_console"]
    return topo