Set wipe-workspace for the onomondo-eim and onomondo-ipa jobs to true, so previous failures cannot influence new jenkins job runs. E.g. currently we had gerrit-onomondo-ipa-build failing with:
Most existing jobs call scripts/osmo-clean-workspace.sh from osmo-ci.git at the beginning of their jenkins.sh instead of using wipe-workspace. But this doesn't have any advantage here while making jenkins.sh more complex. Let's use the built-in feature from jenkins here.
