tests: Fix OVN_CHECK_PACKETS_REMOVE_BROADCAST macro. #4683

Job	Run time
linux rpm fedora	6m 50s
Prepare container	3m 50s
osx clang --disable-ssl	2m 15s
linux gcc --disable-ssl	2m 45s
linux clang --disable-ssl	2m 40s
linux gcc test -300	9m 19s
linux gcc test 301-600	6m 19s
linux gcc test 601- unstable	6m 38s
linux clang test sanitizers -300	12m 46s
linux clang test sanitizers 301-600	8m 57s
linux clang test sanitizers 601- unstable	11m 23s
linux gcc test -ljemalloc -300	9m 51s
linux gcc test -ljemalloc 301-600	6m 42s
linux gcc test -ljemalloc 601- unstable	7m 1s
linux gcc system-test-dpdk dpdk -100	17m 4s
linux gcc system-test-dpdk dpdk 101- unstable	14m 38s
linux gcc system-test-userspace -100	16m 8s
linux gcc system-test-userspace 101- unstable	13m 16s
linux gcc system-test -100	18m 29s
linux gcc system-test 101- unstable	17m 26s
linux clang system-test sanitizers -100	20m 20s
linux clang system-test sanitizers 101- unstable	19m 16s
linux x86 gcc --disable-ssl	2m 43s
	3h 56m 36s

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