[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/118/ : SUCCESS in 1h 31m 28s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/109/ : UNSTABLE in 3h 51m 04s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/110/ : UNSTABLE in 4h 12m 36s