Migrate to new random service interface

Migrate the RandomFilter module to the new random
service interface designed for multithreading.
Fixed thread-safety issues with PixelToFEDAssociateFromAscii

Changed the class statics to be member data. This avoids potential
thread-safety issues. The additional minor changes were to support
this change or to make mainentance easier. The exact functionality
of this class was unchanged.
Merge pull request #2775 from Dr15Jones/makePixelToFEDAssociationFromAsciiThreadSafe

CalibTracker/SiPixelConnectivity -- Fixed thread-safety issues with PixelToFEDAssociateFromAscii
Merge pull request #2771 from wddgit/migrateRandomFilter

IOMC/RandomEngine -- Migrate to new random service interface
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X