jdbc-mysql gem includes multiple driver .jar files

[kares]

jdbc-mysql 5.1.47 includes:

• mysql-connector-java-5.1.47-bin.jar ✔️
• mysql-connector-java-8.0.11.jar 🔴

jdbc-mysql 8.0.17 includes:

• mysql-connector-java-8.0.17.jar ✔️
• mysql-connector-java-8.0.11.jar 🔴

NOTE: that these cause no issues in a typical JRuby (on Rails) scenario as the gem will only add and load files from one ja.
However there might be issues when the .jar would copied to a class-path (e.g. when using Warbler) that might lead to double driver registering issues.

[kares]

updated and released 5.1.49 3484167
as well as 8.0.20 8b27e85 (newer 8.0.x version will need more testing)