Remove the isLocal and use location() == Unknown.

See also:

https://hypernews.cern.ch/HyperNews/CMS/get/swReleases/3993.html
Merge pull request #2193 from ktf/fix-is-local

Reco fixes -- Remove the isLocal and use location() == Unknown.
Merge remote branch 'origin/CMSSW_7_0_X' into CMSSW_7_0_X
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X