[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/219/ : SUCCESS in 1h 38m 26s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/212/ : SUCCESS in 3h 04m 43s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/211/ : UNSTABLE in 4h 14m 20s