Noticed that org.eclipse.jdt.ui creates several ArrayContentProvider
instances instead of using the static factory method. As
ArrayContentProvider is stateless, we recommmend in platform to avoid
creating ArrayContentProvider instances.

Change-Id: I7ba595333b52625a600aceef75ea8ae63a649062
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>