Fix testvars usage in versioning3 tests #8323

Job	Run time
Pre-build for cache	2m 24s
Set up single test	22s
Misc checks	5m 32s
Functional test (ubuntu-20.04, 0, cass_es)	14m 4s
Functional test (ubuntu-20.04, 0, cass_es8)	14m 48s
Functional test (ubuntu-20.04, 0, sqlite)	13m 15s
Integration test	1m 56s
Functional test xdc (cass_es)	16m 56s
Functional test ndc (cass_es)	3m 44s
Functional test (ubuntu-20.04, 0, mysql8)	14m 21s
Functional test ndc (cass_es8)	3m 54s
Functional test (ubuntu-20.04, 0, postgres12)	12m 5s
Functional test xdc (cass_es8)	17m 46s
Functional test ndc (mysql8)	3m 33s
Unit test	3m 27s
Functional test (ubuntu-20.04, 0, postgres12_pgx)	12m 48s
Functional test xdc (mysql8)	19m 5s
Functional test (ubuntu-20.04, 1, cass_es)	15m 25s
Functional test xdc (postgres12)	16m 15s
Functional test ndc (postgres12)	3m 16s
Functional test (ubuntu-20.04, 1, cass_es8)	15m 47s
Functional test xdc (postgres12_pgx)	18m 55s
Functional test ndc (postgres12_pgx)	3m 13s
Functional test (ubuntu-20.04, 1, sqlite)	12m 36s
Functional test (ubuntu-20.04, 1, mysql8)	14m 0s
Functional test (ubuntu-20.04, 1, postgres12)	13m 21s
Functional test (ubuntu-20.04, 1, postgres12_pgx)	12m 18s
Functional test (ubuntu-20.04, 2, cass_es)	12m 31s
Functional test (ubuntu-20.04, 2, cass_es8)	14m 22s
Functional test (ubuntu-20.04, 2, sqlite)	11m 33s
Functional test (ubuntu-20.04, 2, mysql8)	12m 55s
Functional test (ubuntu-20.04, 2, postgres12)	11m 58s
Functional test (ubuntu-20.04, 2, postgres12_pgx)	13m 23s
Test Status	1s
	6h 1m 49s

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