Check for configured instead of hard-coded database in DbUtilsTest

[jeromegamez]

Greetings 👋,

I'm currently setting up this repo and its test suite on my local machine (PHP 8.0.5, MySQL 8.0.23) and am coming across some problems while I'm learning the ropes 😅.

With the help of @MGatner I was able to connect the test suite to my local database by adding this snippet to my phpunit.xml:

<phpunit>
    <php>
		<!-- Database configuration -->
		<env name="database.tests.strictOn" value="true"/>
		<env name="database.tests.hostname" value="localhost"/>
		<env name="database.tests.database" value="codeigniter"/>
		<env name="database.tests.username" value="root"/>
		<env name="database.tests.password" value=""/>
		<env name="database.tests.DBDriver" value="MySQLi"/>
		<env name="database.tests.DBPrefix" value="tests_"/>
    </php>
</phpunit>

Since I like to name my local databases after the project I'm working with, I used codeigniter as the database name (instead of test); but this caused some tests to fail because test was hardcoded in them 🙈, so I'd like to propose this change which made it work for me, and, I hope, for you as well 😅.

[lonnieezell]

Hey @jeromegamez nice catch! Thanks for the PR.