[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/142/ : UNSTABLE in 1h 51m 51s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/135/ : UNSTABLE in 3h 58m 48s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/134/ : UNSTABLE in 3h 43m 37s