ovn-controller: Enforce ovn-encap-ip-default for non-lsp traffic. #3385

Job	Run time
osx clang --disable-ssl	2m 30s
Prepare container	1m 3s
linux rpm fedora	7m 6s
linux gcc --disable-ssl	2m 41s
linux clang --disable-ssl	2m 38s
linux gcc test -300	9m 47s
linux gcc test 301-600	7m 34s
linux gcc test 601- unstable	7m 16s
linux clang test sanitizers -300	13m 51s
linux clang test sanitizers 301-600	10m 20s
linux clang test sanitizers 601- unstable	12m 24s
linux gcc test -ljemalloc -300	10m 20s
linux gcc test -ljemalloc 301-600	7m 27s
linux gcc test -ljemalloc 601- unstable	7m 20s
linux gcc system-test-dpdk dpdk -100	16m 41s
linux gcc system-test-dpdk dpdk 101- unstable	16m 46s
linux gcc system-test-userspace -100	15m 48s
linux gcc system-test-userspace 101- unstable	15m 30s
linux gcc system-test -100	18m 11s
linux gcc system-test 101- unstable	19m 54s
linux clang system-test sanitizers -100	20m 0s
linux clang system-test sanitizers 101- unstable	21m 59s
linux x86 gcc --disable-ssl	2m 47s
	4h 9m 53s

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