Use m2e 1.5.0 dev repo

Signed-off-by: Fred Bricon <fbricon@gmail.com>
bump tycho version to 0.18.0

Signed-off-by: Fred Bricon <fbricon@gmail.com>
Bump version to 1.5.0-SNAPSHOT

Signed-off-by: Fred Bricon <fbricon@gmail.com>