use existing virtualenv version if possible to avoid setuptools conflict
Catch file not found exception
"Partial du copy to cu enabled"
Added method to access the number of nodes by Pilot-Manager, acquired by
a Pilot.
Merge branch 'master' into develop

* master:
  Catch file not found exception
  use existing virtualenv version if possible to avoid setuptools conflict

Conflicts:
	bootstrap/bigjob-bootstrap.py
Merge branch 'Pradeep' into develop

* Pradeep:
  Added method to access the number of nodes by Pilot-Manager, acquired by a Pilot.
  "Partial du copy to cu enabled"
benchmarking backends for iterative Pilot-Data