Project cbi.p2repo.aggregator_addComposites

This manual-only job creates the composites at .../cbi/updates/aggregator/ide/4.8 and .../cbi/updates/aggregator/headless/4.8.

We have a separate job for composites so that an I-build can be tested some before adding to the composite where everyone will get pseudo-automatically.

The composite XML files are literally re-created each time, based on the most recent three I-builds (so "bad" I-builds should be removed before running this job!).

This is a "script only" job, but the repository was left in source control, since technically the script here could be ran from its git version in
${WORKSPACE}/org.eclipse.cbi.p2repo.aggregator/org.eclipse.cbi.p2repo.releng.parent/buildScripts/writeComposites.sh