This was supposed to be supported with the addition of content id to
filenames, but it was not working.

Added feature to gpddboost --readFile option to accept regular
expression in filename and search the data domain directory for a file
that matches. If a file exists with the matching content id, but a
different dbid, we will find it and be able to restore.
Co-authored-by: NChris Hajas <chajas@pivotal.io>
Co-authored-by: NKaren Huddleston <khuddleston@pivotal.io>