switch to official driver by default #207

Job	Run time
test (latest-cd, old, intersystems)	48s
test (latest-em, new, iris)	1m 13s
test (latest-em, new, intersystems)	1m 13s
test (latest-cd, new, iris)	1m 15s
test (latest-preview, new, iris)	1m 15s
test (latest-preview, old, iris)	46s
test (latest-preview, old, intersystems)	50s
test (latest-em, old, iris)	42s
test (latest-cd, new, intersystems)	1m 13s
test (latest-em, old, intersystems)	46s
test (latest-preview, new, intersystems)	1m 14s
test (latest-cd, old, iris)	49s
deploy	1s
	12m 5s

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