from getByLabel to getByToken
Add customise to drop non-threadsafe parts from the process.
Merge pull request #1517 from lucamartini/getByToken

Consumes migration -- From getByLabel to getByToken
Merge pull request #1558 from ktf/drop-non-mt-services2

Add customise to drop non-threadsafe parts from the process.
Merge remote-tracking branch 'origin/CMSSW_7_0_X' into CMSSW_7_0_X