check that the time between notify messages is not too small

(cherry picked from commit 47a4e0ee)
21 jobs for 760-the-notify-system-test-incorrectly-detects-startup-notify-rate-error-v9_12 in 13 minutes and 13 seconds (queued for 1 minute and 16 seconds)
Status Job ID Name Coverage
  Precheck
passed precheck:debian:sid:amd64 #124252
amd64 docker linux

00:00:20

 
  Build
passed build:asan:debian:sid:amd64 #124256
amd64 docker linux

00:01:44

passed build:centos:centos6:amd64 #124253
amd64 docker linux

00:02:07

passed build:centos:centos7:amd64 #124254
amd64 docker linux

00:02:17

passed build:debian:sid:amd64 #124255
amd64 docker linux

00:02:13

passed build:debian:sid:i386 #124257
i386 docker linux

00:01:57

passed noassert:build:debian:sid:amd64 #124258
amd64 docker linux

00:02:23

 
  Test
passed docs:debian:sid:amd64 #124259
amd64 docker linux

00:00:45

passed install:debian:sid:amd64 #124270
amd64 docker linux

00:02:28

passed noassert:systemtest:debian:sid:amd64 #124272
amd64 docker linux

00:05:59

passed noassert:unittest:debian:sid:amd64 #124271
amd64 docker linux

00:00:43

passed systemtest:asan:debian:sid:amd64 #124268
amd64 docker linux

00:06:38

passed systemtest:centos:centos6:amd64 #124265
amd64 docker linux

00:05:59

passed systemtest:centos:centos7:amd64 #124266
amd64 docker linux

00:05:54

passed systemtest:debian:sid:amd64 #124267
linux amd64 docker

00:05:57

passed systemtest:debian:sid:i386 #124269
i386 docker linux

00:06:06

passed unittest:asan:debian:sid:amd64 #124263
amd64 docker linux

00:00:46

passed unittest:centos:centos6:amd64 #124260
amd64 docker linux

00:00:46

passed unittest:centos:centos7:amd64 #124261
amd64 docker linux

00:00:44

passed unittest:debian:sid:amd64 #124262
amd64 docker linux

00:00:51

passed unittest:debian:sid:i386 #124264
i386 docker linux

00:00:42