Use CondDB to fetch time bias corrections.

Some additional configuration files might also need to be changed in the next commit.
Remove doE(E|B)timeCorrection from EcalUncalibRecHit producers and relevant configuration files.

Whether time correction is applied now depends on which EcalTimeBiasCorrections record is used.
Merge pull request #2397 from dmitrijus/timebias-use-conditions

HLT -- Make Ecal TimeBias correction to use a new GT.