[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/224/ : SUCCESS in 1h 39m 32s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/217/ : SUCCESS in 3h 02m 21s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/216/ : UNSTABLE in 4h 32m 14s