[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/97/ : UNSTABLE in 1h 29m 32s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/88/ : UNSTABLE in 3h 26m 26s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/89/ : UNSTABLE in 3h 57m 54s