Load custom ToolbarButton Images (IAction) from OSGi Bundle

Currently in Actions.java in the method getActionImage, the image is loaded from the org.adempiere.base bundles class loader by calling:

InputStream inputStream = Actions.class.getClassLoader().getResourceAsStream(path);

This has a disadvantage since you would either have to export action.images in your bundles manifest - which can cause split package problem when having 2 or more bundles for toolbarbuttons - or you have to create a fragment holding your images.

This could be solved by loading the image directly from the osgi bundle via the actions class loader (see patch)