Update to newer version of amber. Remove hard coded config.
added NLA repository as couldn't find ojdbc driver in nla-public-releases.
modularize data migration mappings.
Merge pull request #1 from nla/mig-bk-md

DCM data migration script
added more metadata mappings for dcm data migration.
re-orged migration to migrate work and all children first, then populate their copies in a batch as next step.
some refactoring on dbi.
removed commented out code.
minor updates.
removed the reference code perserveInAmber().
Merge pull request #2 from nla/mig-bk-md

Mig bk md
added amber copy and file field mappings.
minor update.
expended on migration status checking and added mapping for copies.
added db qry to retrieve files.
added migration of fields in copy files and image files.
added more migration details on files.
Merge branch 'mig-bk-md' of https://github.com/nla/dcmdb into mig-bk-md
updates to migration script.
refactored the code to separate the data mapping from the actual migration.