[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/498/ : UNSTABLE in 1h 33m 33s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/497/ : SUCCESS in 2h 59m 09s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/214/ : SUCCESS in 3h 14m 13s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/500/ : UNSTABLE in 4h 30m 42s