In order to accomodate bison parsing for JSON text and SimpleParser
based element parsing, virtual methods were added to allow derivations
to migrate.

src/lib/process/d_cfg_mgr.h
src/lib/process/d_cfg_mgr.cc
    DCfgMgrBase::parseElement() - new method to allow derivaitons
    to support alternate Element parsers on a element by element basis

    DCfgMgrBase::buildParams()
    DCfgMgrBase::buildAndCommit() - added call to parseElement()

src/lib/process/d_controller.h
src/lib/process/d_controller.cc
    DControllerBase::parseFile() - new method to allow derivations
    to use alternate JSON parsers
    DControllerBase::configFromFile() - added call to parseFile()