MARC 999 field: Put Inventory instance UUID

Right after creating Inventory instances we can extract instance's UUID from 'location' response header and put it into '999' field.

NOTE: This is needed ASAP after MODSOURMAN-99, per A-M

Development notes:
Expected algorithm of how mod-source-record-manager should process raw records (ChunkProcessingService):
1 saves raw records into source-record-storage;
2 updates job fields (status, runBy, progress, started date);
3 transforms raw records into parsed records using marc4j, generates and puts UUID for each parsed record, does not save parsed records!
4 creates new Inventory instance for each parsed record, extracts instance UUID from 'location' header (in response) ;
5 puts UUIDs from step 3 and 4 into '999' field to each parsed record, saves parsed records then into source-record-storage(should be new method in ChangeEngineService);
6 sets out 'State' field to received chunk;
7 checks if processing completed;

Finally '999' should look like this:
Tag: 999
Indicator 1: f (lower-case letter f)
Indicator 2: f
Subfield i: associated Instance UUID
Subfield s: SRS UUID
So a fully created 999 field would look something like this (using $ as the subfield indicator):

999 ff$i<Associated Instance UUID>$s<SRS UUID>