[Bug]: long block extension trigger is extending the auction by too long

[ze97286]

Problem encountered

Suppose we're in a monitoring auction and we see a long block, the expiry of the long block duration should be between now and the duration implied by the threshold rather than just extend the existing auction by the duration. E.g. suppose the monitoring auction should end at 10:00 and at 9:45 we get a long block, which implies 1 minute auction duration - the auction should not be extended at all. If the auction duration implied by the long block is 20 minutes, then the auction should be extended by 5 minutes, etc.

Observed behaviour

Extension of an auction due to long block does not work as expected.

Expected behaviour

Long block extension should be calculated with respect to the current time and only extend the auction if the current time + duration implied by the threshold is later than the current auction expiry.

Steps to reproduce

1. Submit `xyz` transaction
2. With this payload
3. Query `abc` API
4. Observe the error

Software version

develop

Failing test

No response

Jenkins run

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Configuration used

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Relevant log output

No response