Support default sort parameters for WFS 1.1.0 sources.

[glenhein]

What does this PR do?

Support default sort parameters for WFS 1.1.0 sources.

Will add a response property listing the sort property name if it was removed as being unsupported.

Who is reviewing it?

@derekwilhelm @jlcsmith

How should this be tested?

Configure a WFS source that does not support RELEVANCE. Leave the default sort property and default sort order blank in the config. Confirm that a search that sorts by RELEVANCE returns unsorted results. Change the config to use "name" and "ASCENDING" for the default property and order. Confirm that a search that sorts by RELEVANCE returns results sorted by name.

Any background context you want to provide?

What are the relevant tickets?

Fixes: #____

Screenshots

Checklist:

• [ ] Documentation Updated
• [ ] Update / Add Threat Dragon models
• [ ] Update / Add Unit Tests
• [ ] Update / Add Integration Tests

Notes on Review Process

Please see Notes on Review Process for further guidance on requirements for merging and abbreviated reviews.

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