Bump mysql-connector-java in /mapstore/mapstore-sample-hazelcast4-jdbc

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 8.0.15 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@8.0.15...8.0.16)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

mapstore/mapstore-sample-hazelcast4-jdbc/pom.xml

@@ -20,7 +20,7 @@
     <properties>
         <hazelcast-all.version>4.1</hazelcast-all.version>
         <testcontainers.version>1.15.0</testcontainers.version>
-        <mysql.version>8.0.15</mysql.version>
+        <mysql.version>8.0.16</mysql.version>
         <HikariCP.version>3.4.5</HikariCP.version>
         <junit.version>4.13</junit.version>
         <logback-classic.version>1.2.3</logback-classic.version>