multinode-tests: Cleanup before starting migration test. #3453

Job	Run time
osx clang --disable-ssl	2m 38s
linux rpm fedora	6m 45s
Prepare container	3m 24s
linux gcc --disable-ssl	2m 40s
linux clang --disable-ssl	2m 40s
linux gcc test -300	9m 52s
linux gcc test 301-600	7m 20s
linux gcc test 601- unstable	7m 28s
linux clang test sanitizers -300	13m 15s
linux clang test sanitizers 301-600	10m 1s
linux clang test sanitizers 601- unstable	12m 36s
linux gcc test -ljemalloc -300	10m 17s
linux gcc test -ljemalloc 301-600	7m 49s
linux gcc test -ljemalloc 601- unstable	7m 46s
linux gcc system-test-dpdk dpdk -100	16m 46s
linux gcc system-test-dpdk dpdk 101- unstable	17m 1s
linux gcc system-test-userspace -100	15m 59s
linux gcc system-test-userspace 101- unstable	16m 2s
linux gcc system-test -100	20m 27s
linux gcc system-test 101- unstable	24m 49s
linux clang system-test sanitizers -100	22m 29s
linux clang system-test sanitizers 101- unstable	26m 53s
linux x86 gcc --disable-ssl	2m 43s
	4h 27m 40s

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