[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/242/ : SUCCESS in 1h 38m 30s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/235/ : UNSTABLE in 3h 43m 09s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/235/ : UNSTABLE in 4h 10m 13s