northd: lflow-mgr: Don't allocate reference counters until the second… #170

Job	Run time
dpdk gcc	1m 24s
linux rpm fedora	6m 49s
osx clang --disable-ssl	5m 3s
Prepare container	1m 53s
linux gcc --disable-ssl	2m 21s
linux clang --disable-ssl	2m 17s
linux gcc test -300	8m 39s
linux gcc test 301-600	5m 49s
linux gcc test 601- unstable	5m 40s
linux clang test sanitizers -300	11m 37s
linux clang test sanitizers 301-600	8m 28s
linux clang test sanitizers 601- unstable	9m 40s
linux gcc test -ljemalloc -300	9m 8s
linux gcc test -ljemalloc 301-600	6m 19s
linux gcc test -ljemalloc 601- unstable	5m 59s
linux gcc system-test-dpdk dpdk -100	13m 2s
linux gcc system-test-dpdk dpdk 101- unstable	12m 45s
linux gcc system-test-userspace -100	11m 48s
linux gcc system-test-userspace 101- unstable	11m 48s
linux gcc system-test -100	14m 29s
linux gcc system-test 101- unstable	12m 55s
linux clang system-test sanitizers -100	16m 3s
linux clang system-test sanitizers 101- unstable	14m 37s
linux x86 gcc --disable-ssl	2m 12s
	3h 20m 45s

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