[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/166/ : UNSTABLE in 1h 37m 06s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/159/ : UNSTABLE in 3h 56m 34s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/158/ : UNSTABLE in 4h 24m 07s