[SE-1426] ADH - Introduce “params” in ADH REST call
Product Line:	P&C
Component/s:	Other
Fix Version/s:	SICS 4.9.3

Aim of function
A spreadsheet (.xls, .xlsx) file can be sent to ADH Server for processing through the REST endpoint which takes a MediaType.MULTIPART_FORM_DATA parameters, as well as additional parameters.

Currently, it is possible to send 'docId' and 'fileName' as additional parameters.

This enhancement adds a new parameter 'params'. This is a string of key-value pairs delimited by semicolon. Each pair consists of a key and a value, separated by an equal sign. For example:

mapping=BROKER1;uwYear=1997;contractRef=900491

Each key then becomes a tag/field added at the top of the input data created from the spreadsheet. Each value becomes the value of that tag. This gives full flexibility to include any additional data desired, over and above the data in the spreadsheet, and without further development effort from DXC.

System Parameters Affected
None.

Existing functionality affected
Automated Document Handling.