test_libapparmor_testsute from ubuntu_qrt_apparmor time out on B-5.0 Azure

[Po-Hsu Lin]

Kernel: 5.0.0-1027.29~18.04.1

The ubuntu_qrt_apparmor test passed on instance Basic_A2

However it has timeouted on all the other instances:
  * Standard_B1ms, Standard_D48_v3, Standard_DS15_v2, Standard_DS4_v2, Standard_DS5_v2, Standard_F32s_v2

All of the were stuck at test_libapparmor_testsuite:
10:20:41 ERROR| [stderr] test_sock_dgram (__main__.ApparmorUnixDomainConnect)
10:20:41 ERROR| [stderr] Test mediation of file based SOCK_DGRAM connect ... ok
10:20:41 ERROR| [stderr] test_sock_seqpacket (__main__.ApparmorUnixDomainConnect)
10:20:41 ERROR| [stderr] Test mediation of file based SOCK_SEQPACKET connect ... ok
10:20:41 ERROR| [stderr] test_sock_stream (__main__.ApparmorUnixDomainConnect)
10:20:41 ERROR| [stderr] Test mediation of file based SOCK_STREAM connect ... ok
10:20:41 ERROR| [stderr] test_libapparmor_testsuite (__main__.ApparmorTestsuites)
13:19:19 INFO | Timer expired (10800 sec.), nuking pid 9905
13:19:20 INFO | ERROR ubuntu_qrt_apparmor.test-apparmor.py ubuntu_qrt_apparmor.test-apparmor.py timestamp=1574860760 localtime=Nov 27 13:19:20 Test timeout expired, rc=15
13:19:20 INFO | END ERROR ubuntu_qrt_apparmor.test-apparmor.py ubuntu_qrt_apparmor.test-apparmor.py timestamp=1574860760 localtime=Nov 27 13:19:20

[Po-Hsu Lin (cypressyew)]

From the test result in the last cycle (5.0.0-1026.28~18.04.1-azure)

It has passed on:
 * Basic_A2
 * Standard_D48_v3
 * Standard_DS4_v2
 * Standard_DS5_v2
 * Standard_DS15_v2

[Po-Hsu Lin (cypressyew)]

Passed after retest, closing this bug.