Top flaky test: tst_qmqttconnectionproperties::initTestCase

Test case: tst_qmqttconnectionproperties::initTestCase has failed 32 times and was flaky 0 times last week.

The test has blocked around 32 gerrit changes past week

Coin log excerpt from failed run:
agent:2024/07/05 23:19:59 build.go:404: 3: QFATAL : tst_QMqttConnectionProperties::initTestCase() Unknown location to start MQTT test broker.
agent:2024/07/05 23:19:59 build.go:404: 3: FAIL! : tst_QMqttConnectionProperties::initTestCase() Received a fatal error.
agent:2024/07/05 23:19:59 build.go:404: 3: Totals: 0 passed, 1 failed, 0 skipped, 0 blacklisted, 2ms
agent:2024/07/05 23:19:59 build.go:404: 3: ********* Finished testing of tst_QMqttConnectionProperties *********
agent:2024/07/05 23:19:59 build.go:404: 3: Received signal 6 (SIGABRT)
agent:2024/07/05 23:19:59 build.go:404: 3: initTestCase function time: 1ms, total time: 2ms
agent:2024/07/05 23:19:59 build.go:404: 3:
agent:2024/07/05 23:19:59 build.go:404: 3: === Stack trace ===
agent:2024/07/05 23:19:59 build.go:404: 3: [New LWP 3261]
agent:2024/07/05 23:20:05 build.go:404: 3: [Thread debugging using libthread_db enabled]
agent:2024/07/05 23:20:05 build.go:404: 3: Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".
agent:2024/07/05 23:20:05 build.go:404: 3: 0x0000ffffb607eb7c in __GI___wait4 (pid=pid@entry=3262, stat_loc=stat_loc@entry=0x0, options=options@entry=0, usage=usage@entry=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:27
...

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