Bump mysql-connector-java from 5.1.6 to 8.0.16

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.6 to 8.0.16.
- [Release notes](https://github.com/mysql/mysql-connector-j/releases)
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.0/CHANGES)
- [Commits](mysql/mysql-connector-j@5.1.6...8.0.16)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -22,7 +22,7 @@
         <hibernate.version>
             5.2.18.Final
         </hibernate.version>
-        <mysql.version>5.1.6</mysql.version>
+        <mysql.version>8.0.16</mysql.version>
         <springboot.version>2.5.2</springboot.version>
         <jackson.version>2.4.1</jackson.version>
     </properties>