tests: Use IPv6 prefix reserved for documentation. #3323

Job	Run time
linux rpm fedora	6m 54s
dpdk gcc	5s
Prepare container	2m 47s
osx clang --disable-ssl	2m 5s
linux gcc --disable-ssl	2m 22s
linux clang --disable-ssl	2m 16s
linux gcc test -300	8m 51s
linux gcc test 301-600	5m 42s
linux gcc test 601- unstable	6m 3s
linux clang test sanitizers -300	11m 49s
linux clang test sanitizers 301-600	8m 0s
linux clang test sanitizers 601- unstable	9m 36s
linux gcc test -ljemalloc -300	9m 26s
linux gcc test -ljemalloc 301-600	6m 0s
linux gcc test -ljemalloc 601- unstable	6m 9s
linux gcc system-test-dpdk dpdk -100	16m 16s
linux gcc system-test-dpdk dpdk 101- unstable	11m 17s
linux gcc system-test-userspace -100	14m 51s
linux gcc system-test-userspace 101- unstable	10m 12s
linux gcc system-test -100	17m 52s
linux gcc system-test 101- unstable	14m 8s
linux clang system-test sanitizers -100	19m 34s
linux clang system-test sanitizers 101- unstable	15m 52s
linux x86 gcc --disable-ssl	2m 12s
	3h 30m 19s

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