Bump Dependency Check to 9.0.6 so synchronization works again

[Jurrie]

• Bumped MySQL Docker image to 8.0.31 (according to this users are encouraged to upgrade to MySQL 8.0).
• Bumped the MySQL JDBC driver to com.mysql:mysql-connector-j:8.2.0.
• Bumped OWASP Dependency Check to 9.0.6. This makes synchronization work again.

I currently experience a lot of SQLException: Incorrect string value: '\xEF\xBF\xBDboa...' for column 'p_shortDescription' at row 1 in my /dependencycheck/update.log file. I also read that that NVD is deprecating their old RSS feeds. To use their newer API you should use the 9.x versions of OWASP Dependency Check. And with the 9.x version I don't have a synchronization issue anymore, so I consider it fixed 😀

[stefanneuhaus]

Hey @Jurrie, thank you very much! I just had a first quick look. It looks very thoroughly crafted, you did some nice cleanup as well.
I remember having considered doing the MySQL some time ago, but run into a performance regression. Did you compare the running times for updating the database?
I plan to do the full review and give it a test run during the next weekend. Busy times at work a.t.m., so please bear with me.

[Jurrie]

Hey @stefanneuhaus! No, I did not compare running times for database updates. I know the initial database sync of this new Docker image took 54:17 on my laptop. I see my current production Docker image (version 8.0.0) took 48:00. Would seem comparable at first, but keep in mind that my laptop is a lot faster than the production VM and it runs a newer Docker version. Maybe you are able to check this when you do a full review?

[stefanneuhaus]

Thanks for the PR, @Jurrie , very much appreciated!