[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/122/ : SUCCESS in 1h 38m 27s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/113/ : SUCCESS in 3h 19m 37s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/114/ : UNSTABLE in 4h 17m 42s