[509216] Update the version of Tycho used in the build to 0.26.0

Reworked the way dependencies are defined for the test bundles, as the
old way didn't work any longer

Bug: 509216

Change-Id: I535c0021c48514b593b18bfdf5f3ac188e813983
Signed-off-by: Krum Tsvetkov <krum.tsvetkov@sap.com>
3 files changed