add_key05 from ubuntu_ltp_syscalls failed on Trusty

Issue found on Trusty 3.13.0-177-generic

This issue was fixed in bug 1869644

Trusty was not tested back then:

<<<test_start>>>
tag=add_key05 stime=1590053015
cmdline="add_key05"
contacts=""
analysis=exit
<<<test_output>>>
tst_buffers.c:55: INFO: Test is using guarded buffers
incrementing stop
tst_test.c:1246: INFO: Timeout per run is 0h 05m 00s
add_key05.c:52: INFO: Created user ltp_add_key05_0
add_key05.c:193: INFO: User: 0, UID: 1001
add_key05.c:90: INFO: test max bytes under unprivileged user
add_key05.c:115: PASS: add_key(test_inv) failed as expected: EDQUOT (122)
add_key05.c:134: FAIL: add_key(test_max) failed unexpectedly: EDQUOT (122)
add_key05.c:52: INFO: Created user ltp_add_key05_1
add_key05.c:193: INFO: User: 1, UID: 1002
add_key05.c:151: INFO: test max keys under unprivileged user
add_key05.c:158: FAIL: add keyring key(abc200) failed: EDQUOT (122)
add_key05.c:178: FAIL: max used key 199, key allow max key 200
userdel: ltp_add_key05_1 mail spool (/var/mail/ltp_add_key05_1) not found
userdel: ltp_add_key05_1 home directory (/home/ltp_add_key05_1) not found
userdel: ltp_add_key05_0 mail spool (/var/mail/ltp_add_key05_0) not found
userdel: ltp_add_key05_0 home directory (/home/ltp_add_key05_0) not found

HINT: You _MAY_ be missing kernel fixes, see:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a08bf91ce28
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e356101e72

Summary:
passed 1
failed 3
skipped 0
warnings 0
<<<execution_status>>>