[2.26.x] Use processingDetails to generate sort warnings

[alexabird]

What does this PR do?

• ProcessingDetails with null exceptions are shown as warnings in the UI
• Skip sorting (don't fail) if the admin configuration is bad

Who is reviewing it?

@glenhein @jlcsmith @derekwilhelm @jrnorth

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[alexabird]

build now

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[alexabird]

build now

[cxddfbot]

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[cxddfbot]

Build SUCCESS See the job results in legacy Jenkins UI or in Blue Ocean UI.