Upgrade MySQL JDBC connector to latest version

[chirangaalwis]

Description:
Currently, the MySQL JDBC connector version used is of version 5.1.x range. This needs to be upgraded and tested with the latest version of MySQL JDBC connector version [1].

[1]: Latest MySQL JDBC Connector

Affected Product Version:
WSO2 Stream Processor v4.4.x

Sub Tasks:

• Upgrade version in Alpine based Docker resources
• Upgrade version in CentOS based Docker resources
• Upgrade version in Ubuntu based Docker resources
• Code/Peer review