[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/548/ : UNSTABLE in 1h 33m 43s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/548/ : SUCCESS in 3h 15m 56s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/266/ : SUCCESS in 3h 39m 45s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/550/ : UNSTABLE in 4h 37m 40s