OGC-API transaction extension

[Francis Charette-Migneault]

@pvretano Nice work for the addition of 'extensions'.

I have noticed that in the context of both OGC-TB15 and OGC-TB16, many implementations take a reference file as executionUnit[].href (i.e.: HTTP URL to CWL file) or the literal content of that file as executionUnit[].unit object. The following definition should be updated to reflect this since there is no alternative method that explicitly details how to provide 'additionalParameters' that are specific to App Package from OGC-Process API schemas.

https://github.com/opengeospatial/wps-rest-binding/blob/528debd5023c7a37c80f4549518e8886db404a52/extensions/transactions/openapi/schemas/ogcapppkg.yaml#L11-L18

[Panagiotis (Peter) A. Vretanos]

I believe that this can be closed by PR #382. @fmigneault can you confirm?

[Francis Charette-Migneault]

Yes. Closing.