Current docker image with Mariadb doesn't support 4byte unicode

[delsborg]

The mysql-init.sql file creates the database with:
CREATE DATABASE vitrodb CHARACTER SET utf8;

This does not allow extended unicode to be uploaded.
Researching this issue it looks like the DB should be created with utf8mb4.

I've attached the rdf that I tried to update via siteAdmin
testNode.txt

[awoods]

@delsborg : Would you be interested in putting forward a pull-request?

[delsborg]

Hi Andrew, see the utf8mb4 branch.
Also, it still doesn't work for uploads. See email I sent to tech group.
This docker image does help to recreate the problem in a manner that anybody can reproduce :)

[awoods]

Reference: https://github.com/vivo-community/vivo-docker2/tree/utf8mb4

[roflinn]

@delsborg I added this into my PR for you if you didn't see:
CREATE DATABASE vitrodb CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;