Before this patch, for E4 parts:
* The spy shows the generic E4PartWrapper as the view class
* the contributing bundle is not available.

With this patch:
* the spy correctly finds the real class
* the contributing bundle is visible

Change-Id: Id2e2c4b5dcb863727964d54855b606f7eecd68b0
Signed-off-by: Wim Jongman <wim.jongman@remainsoftware.com>