Drop rsync -v option to reduce verbosity of logs.
Source bootstrap environment only once.
Merge pull request #41 from ktf/backport-last-fixes

Backport last fixes
Merge pull request #38 from smuzaffar/V00-21-XX

only download packages which are needed, only add packages in BuildRequi...
Serialize uploads to the same parent.

- This will serialize only uploads to the same repository (e.g. multiple
  IBs uploading at the same time), but not uploads done in different
  repositories (e.g. COMP and CMSSW, or IB and production releases).
Merge pull request #44 from ktf/serialize-parent-uploads-only

Serialize uploads to the same parent.
More garbage collection.
Merge pull request #47 from ktf/more-garbage-collection

More garbage collection.
Adapt to work with new cms-git-tools.
Merge pull request #50 from ktf/fix-cmspm-v21

Adapt to work with new cms-git-tools.
Backport from V00-21-XX
Merge pull request #52 from ktf/backport-22

Backport from V00-21-XX
Do not even attemp upload if the same parent is already used.
Merge pull request #54 from ktf/22-backport

Do not even attemp upload if the same parent is already used.
run checkdeps with -A