northd: Reorder join_logical_ports. #4705

Job	Run time
Prepare container	3m 43s
osx clang --disable-ssl	2m 13s
linux rpm fedora	7m 18s
linux gcc --disable-ssl	2m 40s
linux clang --disable-ssl	2m 47s
linux gcc test -300	9m 28s
linux gcc test 301-600	6m 20s
linux gcc test 601- unstable	6m 34s
linux clang test sanitizers -300	12m 40s
linux clang test sanitizers 301-600	9m 34s
linux clang test sanitizers 601- unstable	12m 2s
linux gcc test -ljemalloc -300	9m 40s
linux gcc test -ljemalloc 301-600	6m 36s
linux gcc test -ljemalloc 601- unstable	7m 11s
linux gcc system-test-dpdk dpdk -100	17m 6s
linux gcc system-test-dpdk dpdk 101- unstable	14m 49s
linux gcc system-test-userspace -100	15m 59s
linux gcc system-test-userspace 101- unstable	13m 38s
linux gcc system-test -100	18m 31s
linux gcc system-test 101- unstable	17m 36s
linux clang system-test sanitizers -100	20m 26s
linux clang system-test sanitizers 101- unstable	19m 36s
linux x86 gcc --disable-ssl	2m 43s
	3h 59m 10s

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