BundleContainerSelectionPage.createTargetLocationProvisionerNode must
delegate more methods to the actual wizard

Change-Id: I61afc86742e307ee5d431e4a948b2c2e1aed2e84
Signed-off-by: Christoph Läubrich <laeubi@laeubi-soft.de>
Reviewed-on: https://git.eclipse.org/r/c/pde/eclipse.pde.ui/+/188942
Tested-by: PDE Bot <pde-bot@eclipse.org>
Reviewed-by: Lars Vogel <Lars.Vogel@vogella.com>