Replace dependency mysql:mysql-connector-java with com.mysql:mysql-connector-j

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
mysql:mysql-connector-java → com.mysql:mysql-connector-j	compile	replacement	5.1.24 → 8.0.33

This PR resolves the vulnerabilities described in Issue #57

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Version 5.1.24

Risk Change	Critical	High	Medium	Low
N/A	0	2	6	2

Version 5.1.49

Risk Change	Critical	High	Medium	Low
-51%	0 (--)	1 (-1 )	1 (-5 )	0 (-2 )

Mend ensures you have the greatest risk reduction ("Recommended Fix"-highlighted in green) by removing as many vulnerabilities as possible. Click to see how we calculate risk reduction.

This is a special PR that replaces mysql:mysql-connector-java with the community suggested minimal stable replacement version.

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