roachtest: restart/down-for-2m failed

[cockroach-teamcity]

SHA: https://github.com/cockroachdb/cockroach/commits/2c865eeb3e3b244468ffc509a62778bd1f46740f

Parameters:

To repro, try:

# Don't forget to check out a clean suitable branch and experiment with the
# stress invocation until the desired results present themselves. For example,
# using stress instead of stressrace and passing the '-p' stressflag which
# controls concurrency.
./scripts/gceworker.sh start && ./scripts/gceworker.sh mosh
cd ~/go/src/github.com/cockroachdb/cockroach && \
stdbuf -oL -eL \
make stressrace TESTS=restart/down-for-2m PKG=roachtest TESTTIMEOUT=5m STRESSFLAGS='-maxtime 20m -timeout 10m' 2>&1 | tee /tmp/stress.log

Failed test: https://teamcity.cockroachdb.com/viewLog.html?buildId=1370685&tab=buildLog

The test failed on branch=provisional_201907021644_v19.2.0-alpha.20190701, cloud=gce:
	restart.go:79,restart.go:92,test.go:1249: expected to recover within 2m0s took 13m3.540515495s

[tbg]

This SHA does not have the fix in #38484.