Build Mongo upgrade scripts into ansible

[j987987]

After investigating MongoDB 4.0/4.1 and using it for a week, I had no problems.

The bulk of this task will migration.

Notes on migration here.

https://github.com/unfetter-discover/unfetter/issues/1357

[infosec-alchemist]

I reassigned this to the next sprint because we want to get people from into 0.3.10 first, with the use of docker volumes and ansible for builds.

[infosec-alchemist]

Lower priority at this point