add an option to save empty ocr during warmup - avoiding incremental … #151

Job	Run time
Upgrade Status (9.5, entity_to_text)	1m 45s
Tests (9.5, entity_to_text)	1m 15s
Functional Tests (9.5, entity_to_text)	1m 41s
Tests (10.0, entity_to_text)	1m 6s
Functional Tests (10.0, entity_to_text)	1m 26s
Tests (10.1, entity_to_text)	1m 12s
Functional Tests (10.1, entity_to_text)	1m 34s
Tests (10.2, entity_to_text)	1m 15s
Functional Tests (10.2, entity_to_text)	1m 35s
	12m 49s

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