Reject requests with unsupported versions

[jisantuc]

Overview

This PR updates the version param validation logic to take a param of which versions are supported. As the validation logic was written before, it was happy to take any string as the version param, which led unexpected successes for versions that don't match
what the server is actually capable of.

Checklist

• Description of PR is in an appropriate section of the CHANGELOG and grouped with similar changes if possible

Demo

$ http :9000 service==wmts request==getcapabilities acceptVersions==1.0.1,1.1.0,1.1.2
HTTP/1.1 400 Bad Request
Content-Length: 50
Content-Type: text/plain; charset=UTF-8
Date: Mon, 15 Feb 2021 21:24:31 GMT

No available version in 1.0.0: 1.0.1, 1.1.0, 1.1.2

$ http :9000 service==wmts request==getcapabilities version==900
HTTP/1.1 400 Bad Request
Content-Length: 76
Content-Type: text/plain; charset=UTF-8
Date: Mon, 15 Feb 2021 21:31:59 GMT

Parameter 'version' has an invalid value of '900'. Needs to be one of: 1.0.0

Testing Instructions

• bring up ogc-example project
• make some GetCapabilities requests as above for wcs, wms, and wmts services using supported versions (1.1.1, 1.3.0, and 1.0.0, respectively)
• make similar requests for unsupported versions (anything else)
• make similar requests with acceptedVersions set to a comma-separated list that includes the valid version -- this should work
• make similar requests with acceptedVersions set to a comma-separated list that excludes the valid version -- this should give you a 400

Closes #307

[pomadchin]

Thanks! Looks good to me! 👍