Create an Exercised Plugins Report

This feature permits the creation of a report that describes
which plugins were exercised and what versions were used.

Two reporter types are available. The default "Console" reporter and
the "Text File" reporter.

The Text File reporter creates a java properties file and is useful
when wanting to be able to see which plugins and their versions were
tested with a particular version of Jenkins Core.

[FIXED JENKINS-23754]
The commons configuration library being used by default appends to the file.

>> How about accepting test name in InstalledPluginReporter.log to disambiguate. (Even if you decide that this implementation does not need that).

Do you mean that include the test name in the properties file?

<test name>::<pluginName> = <plugin version>

plugins.GerritTriggerTest::gerrit-trigger = 2.11.1

Or do you mean in the InstalledPluginReporter interface?