Add-ons are added to "main" class loader when installed

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Steps to reproduce the issue:
1. Run ZAP and install an add-on (example: "Passive scanner rules");
2. Uninstall the add-on installed;
3. Check the classes loaded by the "main" class loader (AddOnLoader) and note 
that the add-on classes are referenced by it.

Remarks:
This will prevent the add-on classes to be unloaded.
If ZAP is restarted after the installation the add-on classes will not be 
referenced by the "main" class loader. 

ZAP Version:
Version 2.0.0.

Original issue reported on code.google.com by THC...@gmail.com on 14 Feb 2013 at 3:43

[GoogleCodeExporter]

r2879

Original comment by THC...@gmail.com on 14 Feb 2013 at 3:52

• Changed state: Committed

[GoogleCodeExporter]

Original comment by psii...@gmail.com on 18 Feb 2013 at 4:14

• Added labels: Build-20130218

[GoogleCodeExporter]

Fixed in 2.1.0

Original comment by psii...@gmail.com on 18 Apr 2013 at 9:49

• Changed state: Fixed