Dockerfile refactoring changes

[ShixinWu16]

Description

Changes to support XDMoD database on an external host

Added a check for if the user was created

• classes/CCR/DB/MySQLHelper.php
• classes/OpenXdmod/Shared/DatabaseHelper.php

Added a question to get XDMoD host

• classes/CCR/DB/MySQLHelper.php
• classes/OpenXdmod/Setup/DatabaseSetup.php

Changed from using bootstrap to entrypoint (in create docker images repo)

• tests/ci/bootstrap.sh

Updated collation from utf8_general_ci to utf8_unicode_ci

• configuration/etl/etl_tables.d/*
• tests/artifacts/xdmod/etlv2/configuration/input/*
• tests/artifacts/xdmod/etlv2/configuration/output/*
• tests/unit/lib/ETL/DbModel/*

Motivation and Context

We wanted to split up the docker containers so that each module has their own container.
This would allow us to share our docker images without having to share everything.

Tests performed

Ran all automated tests, changed tests to match new collation sets

Checklist:

• [ X ] The pull request description is suitable for a Changelog entry
• [ X ] The milestone is set correctly on the pull request
• [ X ] The appropriate labels have been added to the pull request