[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/178/ : SUCCESS in 1h 51m 59s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/171/ : SUCCESS in 3h 26m 03s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/170/ : UNSTABLE in 3h 42m 13s