Fix maxmind database update and reload

[ezelkow1]

The plugin and database update do not play nicely when updating via a copy. This change uses a temporary database and a move to make it atomic, then does a touch and reload on remap.config in order to reload the plugin with the new database.

What does this PR (Pull Request) do?

• This PR fixes #REPLACE_ME OR is not related to any Issue

Which Traffic Control components are affected by this PR?

• Traffic Ops ORT

What is the best way to verify this PR?

Set the date back on a maxmind database on a cache. Run t3c and verify that it updates as it should and that an ATS reload is initiated

If this is a bug fix, what versions of Traffic Control are affected?

The following criteria are ALL met by this PR

• This PR includes tests OR I have explained why tests are unnecessary
• This PR includes documentation OR I have explained why documentation is unnecessary
• This PR includes an update to CHANGELOG.md OR such an update is not necessary
• This PR includes any and all required license headers
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)

Additional Information

[jrushford]

Looks good, tested on a cache server belonging to the company for which I work, works as designed.