test: system-ovn: Fix typos in system-test #3279

Job	Run time
dpdk gcc	1m 24s
Prepare container	2m 7s
osx clang --disable-ssl	2m 24s
linux rpm fedora	6m 43s
linux gcc --disable-ssl	2m 20s
linux clang --disable-ssl	2m 17s
linux gcc test -300	8m 54s
linux gcc test 301-600	5m 37s
linux gcc test 601- unstable	6m 6s
linux clang test sanitizers -300	11m 41s
linux clang test sanitizers 301-600	7m 51s
linux clang test sanitizers 601- unstable	9m 34s
linux gcc test -ljemalloc -300	9m 6s
linux gcc test -ljemalloc 301-600	5m 44s
linux gcc test -ljemalloc 601- unstable	6m 21s
linux gcc system-test-dpdk dpdk -100	16m 10s
linux gcc system-test-dpdk dpdk 101- unstable	11m 18s
linux gcc system-test-userspace -100	14m 57s
linux gcc system-test-userspace 101- unstable	10m 13s
linux gcc system-test -100	17m 41s
linux gcc system-test 101- unstable	14m 6s
linux clang system-test sanitizers -100	20m 23s
linux clang system-test sanitizers 101- unstable	15m 44s
linux x86 gcc --disable-ssl	2m 22s
	3h 31m 3s

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