[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/256/ : SUCCESS in 1h 43m 37s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/249/ : UNSTABLE in 3h 48m 31s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/249/ : UNSTABLE in 3h 46m 04s