Return a list of virtual machine names on the minion

    CLI Example:

    .. code-block:: bash

        salt '*' virt.list_domains

def list_domains():
    '''
    Return a list of virtual machine names on the minion

    CLI Example:

    .. code-block:: bash

        salt '*' virt.list_domains
    '''
    data = __salt__['vmadm.list'](keyed=True)
    vms = ["UUID                                  TYPE  RAM      STATE             ALIAS"]
    for vm in data:
        vms.append("{vmuuid}{vmtype}{vmram}{vmstate}{vmalias}".format(
            vmuuid=vm.ljust(38),
            vmtype=data[vm]['type'].ljust(6),
            vmram=data[vm]['ram'].ljust(9),
            vmstate=data[vm]['state'].ljust(18),
            vmalias=data[vm]['alias'],
        ))
    return vms