Publisher could not be updated by EBSCONET

Overview: When renewing an order who's FOLIO POL has a blank publisher field the integration fails.

Steps to Reproduce:

1. Log into bugfest juniper
2. Create order and order line for a title found in EBSCONET
3. Make sure to leave publisher field blank in FOLIO POL
4. Make sure order in EBSCONET has a publisher. All of them do.
5. Add FOLIO POL number to ILS number field in EBSCONET
6. Renew order in EBSCONET
7. Error is returned
8. View error in ebsconet

Expected Results: POL is update successfully AND publisher field is updated.

Actual Results: Update fails, error shown: 

PUT status code 'BadRequest' {"errors":[{"message":"[400 Bad Request] during [PUT] to http://orders/order-lines/137b7ca8-eb51-4b64-bf30-4dd942d5eb6f OrdersClient#putOrderLine(String,CompositePoLine): [{\n \"errors\" : [{{

{\n \"message\" : \"Protected fields can't be modified\",\n \"code\" : \"protectedFieldChanging\",\n \"parameters\" : [ ],\n \"protectedAndModifiedFields\" : [ \"publisher\" ]\n }

}}],\n \"total_records\" : 1\n}]","type":"-1"}],"total_records":1}??

Additional Information: See example in bugfest testing
URL: https://bugfest-juniper.folio.ebsco.com/orders/view/f3be72a2-58df-4ca8-b6db-dcca8f46b76b/po-line/view/137b7ca8-eb51-4b64-bf30-4dd942d5eb6f
Interested parties:

Approach
1. Remove from protected field "Publisher" field
2. To support https://issues.folio.org/browse/MODEBSNET-15 : Remove from protected field "PUBLICATION_DATE("publicationDate")" field