Module controller: Add automatic name change

**UbikLoadPack support** ([Bug 58780](https://bz.apache.org/bugzilla//show_bug.cgi?id=58780&redirect=false)):
Following https://github.com/apache/jmeter/issues/3530, a patch was provided to add automatic name change:
---------------------------------------------------------------------------
After discussing on dev mailing list I`ve prepared new version of Module Controller UI that contains two new fields:

1. Checkbox - enables/disables automatic name change. By default it is disabled. Default value is configurable in jmeter.properties
2. Text field for prefix automatic naming. By default it is empty. Also configurable in jmeter.properties

I`m attaching patch containing changes.

Many thanks,
Maciej Franek
---------------------------------------------------------------------------

This bug is created so that the other one can be closed as it was fixed in 2.13.

OS: All