[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/298/ : SUCCESS in 1h 56m 01s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/291/ : UNSTABLE in 3h 11m 20s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/291/ : SUCCESS in 4h 16m 27s