system-traffic: Add a test with many vxlan tunnels. #578

Job	Run time
dpdk gcc	8s
linux rpm fedora	4m 6s
osx clang --disable-ssl	4m 3s
linux deb no dpdk	6m 24s
clang-analyze	10m 6s
linux gcc --disable-ssl	2m 31s
linux clang --disable-ssl	2m 22s
linux gcc c99	2m 24s
linux clang c99	2m 24s
linux gcc test	8m 18s
linux clang address,undefined test	16m 3s
linux gcc test --enable-shared	11m 0s
linux clang test --enable-shared	11m 15s
linux gcc check check-dpdk dpdk	11m 24s
linux clang check check-dpdk dpdk	11m 23s
linux gcc test -ljemalloc	8m 48s
linux clang test -ljemalloc	8m 53s
linux gcc --enable-afxdp	2m 31s
linux clang --enable-afxdp	2m 39s
linux gcc dpdk --enable-shared	3m 42s
linux clang dpdk --enable-shared	3m 22s
linux gcc dpdk-shared	2m 36s
linux clang dpdk-shared	2m 36s
linux gcc dpdk-shared --enable-shared	4m 6s
linux clang dpdk-shared --enable-shared	3m 24s
linux gcc m32 --disable-ssl	2m 33s
linux gcc check-ovsdb-cluster	6m 15s
linux gcc check-kernel -100	8m 53s
linux gcc check-kernel 100-	8m 58s
linux clang address,undefined check-kernel -100	11m 29s
linux clang address,undefined check-kernel 100-	11m 38s
linux gcc check-offloads -100	9m 8s
linux gcc check-offloads 100-	7m 7s
linux gcc dpdk check-system-userspace	10m 45s
linux clang address,undefined dpdk check-system-userspace	14m 17s
linux gcc dpdk check-system-tso	10m 47s
linux gcc dpdk check-afxdp	30m 15s
	4h 38m 33s

Provide feedback