[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/217/ : SUCCESS in 1h 42m 31s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/210/ : UNSTABLE in 3h 31m 36s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/209/ : UNSTABLE in 3h 49m 43s