[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/265/ : SUCCESS in 1h 59m 29s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/258/ : SUCCESS in 3h 03m 53s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/258/ : UNSTABLE in 3h 53m 58s