Added default AgencyId
If the initiation header does not contain agency specification or does not exists at all, then is this default Agency id used to assign to Bibliographic record Id in the purpose of having at least one local system control number.

Extract of Bibliographic Record Id in NCIP service collection:
A bibliographic record identifier. Examples are Australian National Bibliography Number, OCLC number, or (if the Agency Id attribute is provided instead of the Bibliographic Record Identifier Code), the local system control number.