[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/246/ : SUCCESS in 1h 42m 48s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/239/ : UNSTABLE in 4h 02m 53s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/239/ : UNSTABLE in 4h 35m 19s