ubuntu_lttng_smoke_test failed on F-5.8 PowerPC with fcntl lock file: Resource temporarily unavailable (in utils_create_lock_file()

[Po-Hsu Lin]

Issue found on 5.8.0-34.37~20.04.2

With bug 1900684 fixed, this test can be executed on F-5.8, however it will fail on both P8 / P9 with:
 == lttng smoke test of session create/destroy ==
 PERROR - 01:44:55.388987954 [2117618/2117618]: fcntl lock file: Resource temporarily unavailable (in utils_create_lock_file() at utils.c:662)
 Error: Could not get lock file /var/run/lttng/lttng-sessiond.lck, another instance is running.
 Error: A session daemon is already running.
 Spawning a session daemon
 FAILED (lttng create)
 Error: Session daemon terminated with an error (exit status: 1)
 Error: Problem occurred while launching session daemon (/usr/bin/lttng-sessiond)
 FAILED (lttng destroy)

 == lttng smoke test trace context switches ==
 Error: No session daemon is available
 PERROR - 01:44:55.422535888 [2117621/2117621]: fcntl lock file: Resource temporarily unavailable (in utils_create_lock_file() at utils.c:662)
 Error: Could not get lock file /var/run/lttng/lttng-sessiond.lck, another instance is running.
 Error: A session daemon is already running.
 Spawning a session daemon
 FAILED (lttng create)

 Error: Session daemon terminated with an error (exit status: 1)
 Error: Problem occurred while launching session daemon (/usr/bin/lttng-sessiond)
 Summary: 0 passed, 4 failed