Tests

tests(*) unload provider to make valgrind happy #896

Job	Run time
Tests (1.19.9, 3.1.5, 3.0.9, valgrind, v0.10.20, v0.1.22, -Wno-error)	41m 1s
Tests (1.21.4, 3.1.5, 3.0.9, valgrind, v0.10.25, v0.1.27, -Wno-error)	42m 23s
Tests (1.25.3, 1.1.1w, valgrind perf, v0.10.26, v0.1.28)	37m 50s
Tests (1.25.3, 3.0.13, 3.0.9, valgrind perf lua-kong-nginx-module, v0.10.26, v0.1.28, -Wno-error)	46m 15s
Tests (1.25.3, 3.1.5, 3.0.9, valgrind perf lua-kong-nginx-module, v0.10.26, v0.1.28, -Wno-error)	43m 56s
Tests (1.25.3, 3.2.1, 3.0.9, valgrind perf lua-kong-nginx-module, v0.10.26, v0.1.28, -Wno-error)	44m 17s
Tests (1.25.3, 3.3.0, 3.0.9, valgrind perf lua-kong-nginx-module, v0.10.26, v0.1.28, -Wno-error)	44m 43s
	5h 0m 25s

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