Various fixes related to HCAL OOT pileup corrections code

Moved BoostIODBWriter.h and BoostIODBReader.h from
RecoLocalCalo/HcalRecAlgos/interface to CondTools/Hcal/interface
(per request from Slava and suggestion from Salvatore Di Guida).

Added a convenience config cfi CondDBboost_cfi.py in which
dbFormat is set to boost I/O.

Moved OOT pileup database interface plugin from the "plugins"
directory of RecoLocalCalo/HcalRecAlgos into "test" directory.

Added "data" directory in RecoLocalCalo/HcalRecAlgos and
placed a database file with current OOT pileup corrections objects
there.

No changes expected in functionality or tests.