[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/251/ : SUCCESS in 1h 38m 36s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/244/ : UNSTABLE in 4h 28m 26s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/244/ : UNSTABLE in 3h 02m 35s