The source project of this merge request has been removed.
update tycho to upstream tycho-1.2.0
The latest upstream tycho is 1.5.1 but it needs 1.4.0 to build. tycho-1.2.0 is the first release which builds without any dependency on a previous version of tycho. tycho-1.5.1 is the final target but it can only be done step-by-step.