[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/519/ : UNSTABLE in 1h 42m 26s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/518/ : UNSTABLE in 3h 10m 15s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/236/ : UNSTABLE in 3h 45m 55s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/521/ : SUCCESS in 4h 50m 00s