Added o.a.s.junit.healthcheck bundle
Scripts can now be executed from other directories.
Minion now adds JUnitHealthCheck config before attempting to run health checks.
Minor fix in setup-minion-repo.sh.
Moved general functionality from setup-minion-repo.sh to setup-common.sh, separated artifacts into "common" and "minion".
Added setup-orchestrator.sh which sets up a given Sling instance as an orchestrator (simply installs needed bundles).