[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/108/ : UNSTABLE in 1h 37m 16s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/99/ : UNSTABLE in 4h 02m 54s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/100/ : UNSTABLE in 3h 53m 47s