Changes

Bug 582479 Move to a newer Tycho version

- update tycho version to 4.0.3 - this requires mvn 3.9.x
- add config to o.e.mat.product pom.xml to keep products in zip format
(default changed to .tar.gz)

Change-Id: Ib4b0e2f474bfc617c6886f4f22113b82e96d8a84
Signed-off-by: Krum Tsvetkov <krum.tsvetkov@sap.com>