Discuss whether Rate Controllers should have a finite completion time regardless whether all transactions complete or not

[davidkel]

Both Duration and number of transactions wait for any outstanding transactions to finish, however it seems that this can result in a round taking a very long time to finish as described in this PR

https://github.com/hyperledger/caliper/pull/1162 (adds ability to run duration to terminate after 2x duration set, plus some changes to fixed-load)

This issue is about discussing whether we want to have some round termination strategy is things appear to be just taking too long ? This is easier for run duration vs number of transactions.

Also need to look at the fixes suggested in this PR for fixed-load

[stale[bot]]

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