Allow plugin service to run intances of RunnablePlugin

[bdezonia]

Currently in IJ2 I can do this:

HashMap<String,Object> inputMap = new HashMap<String, Object>();
inputMap.put("display", differentDisplay);
pluginService.run(FindEdges.class, inputMap);

I would like to be able to do this:

FindEdges pluginInstance = new FindEdges();
pluginInstance.setDisplay(differentDisplay);
pluginService.run(pluginInstance);

This would allow developers to populate plugins with unharvested values using public accessor API of a given plugin instance.

[curtis]

Should now be possible with 399d9d37!

[curtis]

There is potential problem I anticipate: setting the Display parameter manually this way will not flag the parameter as "resolved" so the preprocessors will still try to populate it. I'm not sure of the best way around this...

[bdezonia]

Note that these changes were reverted and the running of plugin instances through the plugin service is not going to be allowed