webadmin,userportal: Remove explicit include for generated sources

This patch builds on top of http://gerrit.ovirt.org/#/c/34402/
and ensures that everything under target/generated-sources/gwt
directory is added to project's resources.

Change-Id: Iaa38ee88c655e6b93c2a53dda34d341c961e83ae
Signed-off-by: Vojtech Szocs <vszocs@redhat.com>