mustache: rework option passing #92

Job	Run time
test-csharp-sdk (latest, 8.0.x)	1m 23s
test-typescript-sdk-r4 (latest)	16s
test-typescript-ccda-example (latest)	25s
test-mustache-java-r4-example (latest, 25)	1m 15s
test-mustache-java-r4-example (latest, 21)	1m 17s
	4m 36s

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