pstamptool -getdependent should return whole object not just id

[bills]

Currently pstamptool -getdependent ouputs only the dep_id of the
newly created or already existing pstampDependent.

It should print out the entire object as an mdc doc. This would allow the parser to check for errors and fault the job if
necessary.

For example if pstampDependent.fault == PSTAMP_GONE that error should be passed along to the client. As it is now we have to
queue the job and have pstamp_checkdepedent fault it.