Let's have Plugins Manager added in JMeter by default

**Sebastian Boga** ([Bug 63459](https://bz.apache.org/bugzilla//show_bug.cgi?id=63459&redirect=false)):
There are some plugins that are very useful for our work as JMeter testers.
We should put the Plugins Manager by default in JMeter main product.
How to have Plugins Manager in JMeter it's described here: https://jmeter-plugins.org/install/Install/

It's just a matter of having a JAR file in ext\lib. The plugins-manager.jar file is public and available to anyone.

Let's avoid doing this manually everytime a new version of JMeter is released.

Votes in Bugzilla: 1
OS: All