[SCIMPLE-93] Set type=reference, when referenceTypes are set

[tm-drtina]

https://issues.apache.org/jira/browse/SCIMPLE-93

Fields that have referenceTypes set should have type reference. Previously we set type=reference for field type, but it should be on field ref

          {
            "name" : "value",
            "type" : "reference",
            "referenceTypes" : ["external"],
            "multiValued" : false,
            "description" : "URL of a photo of the User.",
            "required" : false,
            "caseExact" : false,
            "mutability" : "readWrite",
            "returned" : "default",
            "uniqueness" : "none"
          },

source: https://datatracker.ietf.org/doc/html/rfc7643#section-8.7.1 (page 59)

A reference has a "referenceTypes" attribute...
...
By convention, a reference is commonly represented as a "$ref" sub-attribute in complex or multi-valued attributes; however, this is OPTIONAL.

source: https://datatracker.ietf.org/doc/html/rfc7643#section-2.3.7

The condition is not very nice, since the default is a list with one empty string...

[bdemers]

This is great! Thanks @tm-drtina!

Any ideas for a test or two? If you don't have time to implement them, that's understandable, but a little pseudo code, will help too!

[tm-drtina]

I saw there were some tests for schema: https://github.com/apache/directory-scimple/blob/develop/scim-spec/scim-spec-schema/src/test/java/org/apache/directory/scim/spec/schema/SchemaTest.java

But I think the simplest one would be to query /v2/Schemas and compare the result with the static jsons, which are already in the test resources. It's been a while since I last used in Java, but I can take a look :)

[bdemers]

Fixed in: #452

Thanks again @tm-drtina! this was really helpful and me track down a related issue!