Change detId2denseId to detId2denseIdHT
Fix HcalHardcodeCalibrations and HcalTopology bugs

In HcalHardcodeCalibrations.cc:
    * We now only save a detid if it is valid (instead of only if it is
      invalid)

In HcalTopology.cc:
    * Correctly reject eta 27
    * Use the correct size constants for the denseId