Revised juniper abort config to remove candidate config file after rollback 0 to avoid issues where junos would
prompt for confirmation when exiting config mode to go delete the candidate config file prompting timeouts.
Dropped Python3.6 support as it is now EOL! Of course, scrapli probably still works just fine with 3.6 (if you
install the old 3.6 requirements), but we won't test/support it anymore.
Wow, pretty empty here... guess that's a good sign things have been working :p