Making improvement of Hcal Validation package

1. Improve some histogram binning
2. fix wrong TDirectory names in DAQOffline/Hcal
3. Update Zdc related relval code
Automatically ported from CMSSW_7_2_X #5285
Yes, it's fixed. The packages are rebased and the conflict are fixed. But how do I update code related to this PR? I know how to create a new PR... P.S., the fix now is lihux25:fix_relval_bugs_Sep24 instead of the lihux25:fix_relval_bugs_Sep09...