I think I found the problem.  The regex in 001_validate_network_interfaces.yml really wants there to be a number after the 'bond' identifier, i.e. bond0.  However, the regex is as follows:

  bond_valid_name="{{ iface_item | regex_search('(^bond[0-9]+)') }}"

which will not return a good value if just 'bond' is passed to it (the output of nmcli -g GENERAL.TYPE device show).

However, I am not an ansible expert, nor am I an expert on how these scripts are called.  I humbly request someone else's expert opinion on this.

Thanks again.