[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/147/ : UNSTABLE in 1h 33m 44s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/140/ : UNSTABLE in 3h 57m 28s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/139/ : UNSTABLE in 3h 31m 16s